EXHIBIT 99.3

                                 HOLOGIC, INC.

                       2000 EMPLOYEE STOCK PURCHASE PLAN


1.   Purpose.
     -------

     The Hologic, Inc. 2000 Employee Stock Purchase Plan (the "Plan") is
intended to provide a method whereby employees of Hologic, Inc. (the "Company")
and participating subsidiaries will have an opportunity to acquire a proprietary
interest in the Company through the purchase of shares of the Company's $.01 par
value common stock (the "Common Stock").  It is the intention of the Company to
have the Plan qualify as an "employee stock purchase plan" under Section 423 of
the Internal Revenue Code of 1986, as amended (the "Code").  The provisions of
the Plan shall, accordingly, be construed so as to extend and limit
participation in a manner consistent with the requirements of that Section of
the Code.

2.   Eligible Employees.
     ------------------

     (a) All employees of the Company or any of its participating subsidiaries
who have completed three consecutive months, or two years, whether or not
consecutive, of employment with the Company or any of its participating
subsidiaries on or before the first day of the applicable Offering Period (as
defined below) shall be eligible to receive options under this Plan to purchase
the Company's Common Stock.  In no event may an employee be granted an option if
such employee, immediately after the option is granted, owns stock possessing
five (5%) percent or more of the total combined voting power or value of all
classes of stock of the Company or of its parent corporation or subsidiary
corporation as the terms "parent corporation" and "subsidiary corporation" are
defined in Section 424(e) and (f) of the Code.  For purposes of determining
stock ownership under this paragraph, the rules of Section 424(d) of the Code
shall apply and stock which the employee may purchase under outstanding options
shall be treated as stock owned by the employee.

     (b) For the purpose of this Plan, the term employee shall not include an
employee whose customary employment is for not more than twenty (20) hours per
week or is for not more than five (5) months in any calendar year.

3.   Stock Subject to the Plan.
     -------------------------

     The stock subject to the options granted hereunder shall be shares of the
Company's authorized but unissued Common Stock or shares of Common Stock
reacquired by the Company, including shares purchased in the open market.  The
aggregate number of shares which may be issued pursuant to the Plan is 300,000,
subject to increase or decrease by reason of stock split-ups, reclassifications,
stock dividends, changes in par value and the like.  If the number of shares of
Common Stock reserved and available for any Offering Period (as defined hereto)
is insufficient to satisfy all purchase requirements for that Offering Period,
the reserved and


available shares for that Offering Period shall be apportioned among
participating employees in proportion to their options.

4.   Offering Periods and Stock Options.
     ----------------------------------

     (a) Six month periods during which payroll deductions will be accumulated
under the Plan ("Offering Periods") will commence on January 1 and July 1 of
each year and end on the June 30 or December 31 next following the commencement
date.  Each Offering Period includes only regular pay days falling within it.
The Offering Commencement Date is the first day of each Offering Period.  The
Offering Termination Date is the applicable date on which an Offering Period
ends under this Section.

     (b) On each Offering Commencement Date, the Company will grant to each
eligible employee who is then a participant in the Plan an option to purchase on
the Offering Termination Date at the Option Exercise Price, as provided in this
paragraph (b), that number of full shares of Common Stock reserved for the
purpose of the Plan as his or her accumulated payroll deductions on the Offering
Termination Date (including any amount carried forward pursuant to Article 8
hereof) will pay for at the Option Exercise Price; provided that such employee
remains eligible to participate in the Plan throughout such Offering Period.
The Option Exercise Price for each Offering Period shall be the lesser of (i)
eighty-five percent (85%) of the fair market value of the Common Stock on the
Offering Commencement Date, or (ii) eighty-five percent (85%) of the fair market
value of the Common Stock on the Offering Termination Date, in either case
rounded up to avoid fractions other than multiples of 1/8.  In the event of an
increase or decrease in the number of outstanding shares of Common Stock through
stock split-ups, reclassifications, stock dividends, changes in par value and
the like, an appropriate adjustment shall be made in the number of shares and
Option Exercise Price per share provided for under the Plan, either by a
proportionate increase in the number of shares and proportionate decrease in the
Option Exercise Price per share, or by a proportionate decrease in the number of
shares and a proportionate increase in the Option Exercise Price per share, as
may be required to enable an eligible employee who is then a participant in the
Plan to acquire on the Offering Termination Date that number of full shares of
Common Stock as his accumulated payroll deductions on such date will pay for at
the Option Exercise Price, as so adjusted.

     (c) For purposes of this Plan, the term "fair market value" on any date
means, if the Common Stock is listed on a national securities exchange or is on
the National Market List of the National Association of Securities Dealers
Automated Quotation ("NASDAQ") system, the average of the high and low sales
prices of the Common Stock on such date on such exchange or as reported on
NASDAQ or, if the Common Stock is traded in the over-the-counter securities
market, but not on the National Market List of NASDAQ, the average of the high
and low bid quotations for the Common Stock on such date, each as published in
the Wall Street Journal.  If no shares of Common Stock are traded on the
Offering Commencement Date or Offering Termination Date, the fair market value
will be determined by taking the average of the fair market values on the
immediately preceding and the next following  business days on which shares of
Common Stock are traded.

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     (d) For purposes of this Plan the term "business day" as used herein means
a day on which there is trading on the NASDAQ or such other national securities
exchange on which the Common Stock is listed.

     (e) No employee shall be granted an option which permits his rights to
purchase Common Stock under the Plan and any similar plans of the Company or any
parent or participating subsidiary corporations to accrue at a rate which
exceeds $25,000 of fair market value of such stock (determined at the time such
option is granted) for each calendar year in which such option is outstanding at
any time.  The purpose of the limitation in the preceding sentence is to comply
with and shall be construed in accordance with Section 423(b)(8) of the Code.

5.   Exercise of Option.
     ------------------

     Each eligible employee who continues to be a participant in the Plan on the
Offering Termination Date shall be deemed to have exercised his or her option on
such date and shall be deemed to have purchased from the Company such number of
full shares of Common Stock reserved for the purpose of the Plan as his or her
accumulated payroll deductions on such date, plus any amount carried forward
pursuant to Article 8 hereof, will pay for at the Option Exercise Price, but in
no event may an employee purchase shares of Common Stock in excess of 3,000
shares of Common Stock on any Offering Termination Date.  If a participant is
not an employee on the Offering Termination Date and throughout an Offering
Period, he or she shall not be entitled to exercise his or her option.  All
options issued under the Plan shall, unless exercised as set forth herein,
expire at the end of the Offering Termination Date with respect to the Offering
Period during which such options were issued.

6.   Authorization for Entering Plan.
     -------------------------------

     (a) An eligible employee may enter the Plan by filling out, signing and
delivering to the Treasurer of the Company an authorization ("Authorization"):

   (i)   stating the amount to be deducted regularly from his or her pay;

   (ii)  authorizing the purchase of stock for him or her in each Offering
         Period in accordance with the terms of the Plan;

   (iii) specifying the exact name in which Common Stock purchased for him or
         her is to be issued in accordance with Article 11 hereof; and

   (iv)  at the discretion of the employee in accordance with Article 14,
         designating a beneficiary who is to receive any Common Stock and/or
         cash in the event of his or her death.

Such Authorization must be received by the Treasurer of the Company at least ten
(10) business days before an Offering Commencement Date.

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     (b) The Company will accumulate and hold for the employee's account the
amounts deducted from his or her pay.  No interest will be paid thereon.
Participating employees may not make any separate cash payments into their
account.

     (c) Unless an employee files a new Authorization or withdraws from the
Plan, his or her deductions and purchases under the Authorization he or she has
on file under the Plan will continue as long as the Plan remains in effect. An
employee may increase or decrease the amount of his or her payroll deductions as
of the next Offering Commencement Date by filling out, signing and delivering to
the Treasurer of the Company a new Authorization. Such new Authorization must be
received by the Treasurer of the Company at least ten (10) business days before
the date of such next Offering Commencement Date.

7.   Maximum Amount of Payroll Deductions.
     ------------------------------------

     An employee may authorize payroll deductions in any even dollar amount up
to but not more than ten percent (10%) of his or her base pay in effect at each
offering commencement date; provided, however, that the minimum deduction in
respect of any payroll period shall be five dollars ($5); and provided further
that the maximum percentage shall be reduced to meet the requirements of Section
4(e) hereof. Base pay means regular straight-time earnings and, if applicable,
commissions, but excluding payments for overtime, bonuses, and other special
payments.

8.   Unused Payroll Deductions.
     -------------------------

     Only full shares of Common Stock may be purchased. Any balance remaining in
an employee's account after a purchase will be reported to the employee and will
be carried forward to the next Offering Period. However, in no event will the
amount of the unused payroll deductions carried forward from a payroll period
exceed the Option Exercise Price per share for the immediately preceding
Offering Period. If for any Offering Period the amount of unused payroll
deductions should exceed the Option Exercise Price per share, the amount of the
excess for any participant shall be refunded to such participant, without
interest.

9.   Change in Payroll Deductions.
     ----------------------------

     Deductions may not be increased or decreased during an Offering Period.

10.  Withdrawal from the Plan.
     ------------------------

     (a) An employee may withdraw from the Plan and withdraw all but not less
than all of the payroll deductions credited to his or her account under the Plan
at any time prior to the Offering Termination Date by delivering a notice to the
Treasurer of the Company (a "Withdrawal Notice") in which event the Company will
promptly refund without interest the entire balance of such employee's
deductions not theretofore used to purchase Common Stock under the Plan.

                                       4


     (b) If employee withdraws from the Plan, the employee's rights under the
Plan will be terminated and no further payroll deductions will be made. To
reenter, such an employee must file a new Authorization at least ten (10)
business days before the next Offering Commencement Date. Such Authorization
will become effective for the Offering Period that commences on such Offering
Commencement Date. Notwithstanding the foregoing, employees who are subject to
Section 16 of the Securities Exchange Act of 1934, as amended, who withdraw from
the Plan may not reenter the Plan until the next Offering Commencement Date
which is at least six months following the date of such withdrawal.

11.  Issuance of Stock.
     -----------------

     Certificates for Common Stock issued to participants will be delivered as
soon as practicable after each Offering Period.  Common Stock purchased under
the Plan will be issued only in the name of the employee, or in the case of
employees who are not subject to Section 16 of the Securities Exchange Act of
1934, as amended, if the employee's Authorization so specifies, in the name of
the employee and another person of legal age as joint tenants with rights of
survivorship.

12.  No Transfer or Assignment of Employee's Rights.
     ----------------------------------------------

     An employee's rights under the Plan are his or hers alone and may not be
transferred or assigned to, or availed of by, any other person.  Any option
granted to an employee may be exercised only by him or her, except as provided
in Article 13 in the event of an employee's death.

13.  Termination of Employee's Rights.
     --------------------------------

     (a) Except as set forth in the last paragraph of this Article 13, an
employee's rights under the Plan will terminate when he or she ceases to be an
employee because of retirement, resignation, lay-off, discharge, death, change
of status, failure to remain in the customary employ of the Company for greater
than twenty (20) hours per week, or for any other reason.  A Withdrawal Notice
will be considered as having been received from the employee on the day his or
her employment ceases, and all payroll deductions not used to purchase Common
Stock will be refunded.

     (b) If an employee's payroll deductions are interrupted by any legal
process, a Withdrawal Notice will be considered as having been received from him
or her on the day the interruption occurs.

     (c) Upon termination of the participating employee's employment because of
death, the employee's beneficiary (as defined in Article 14) shall have the
right to elect, by written notice given to the Treasurer of the Company prior to
the expiration of the thirty (30) day period (or such shorter period if the next
Offering Termination Date is less than 30 days after the employee's death)
commencing with the date of the death of the employee, either (i) to withdraw,
without interest, all of the payroll deductions credited to the employee's
account under the Plan, or (ii) to exercise the employee's option for the
purchase of shares of Common Stock on

                                       5


the next Offering Termination Date following the date of the employee's death
for the purchase of that number of full shares of Common Stock reserved for the
purpose of the Plan which the accumulated payroll deductions in the employee's
account at the date of the employee's death will purchase at the applicable
Option Exercise Price (subject to the maximum number set forth in Article 5),
and any excess in such account will be returned to said beneficiary. In the
event that no such written notice of election shall be duly received by the
Treasurer of the Company, the beneficiary shall automatically be deemed to have
elected to withdraw the payroll deductions credited to the employee's account at
the date of the employee's death and the same will be paid promptly to said
beneficiary, without interest.

14.  Designation of Beneficiary.
     --------------------------

     A participating employee may file a written designation of a beneficiary
who is to receive any Common Stock and/or cash in case of his or her death. Such
designation of beneficiary may be changed by the employee at any time by written
notice. Upon the death of a participating employee and upon receipt by the
Company of proof of the identity and existence at the employee's death of a
beneficiary validly designated by him under the Plan, the Company shall deliver
such Common Stock and/or cash to such beneficiary. In the event of the death of
a participating employee and in the absence of a beneficiary validly designated
under the Plan who is living at the time of such employee's death, the Company
shall deliver such Common Stock and/or cash to the executor or administrator of
the estate of the employee, or if, to the knowledge of the Company, no such
executor or administrator has been appointed, the Company, in the discretion of
the Committee, may deliver such Common Stock and/or cash to the spouse or to any
one or more dependents of the employee as the Committee may designate. No
beneficiary shall, prior to the death of the employee by whom he or she has been
designated, acquire any interest in the Common Stock or cash credited to the
employee under the Plan.

15.  Termination and Amendments to Plan.
     ----------------------------------

     (a) The Plan may be terminated at any time by the Company's Board of
Directors, effective on the next following Offering Termination Date.
Notwithstanding the foregoing, it will terminate when all of the shares of
Common Stock reserved for the purposes of the Plan have been purchased.  Upon
such termination or any other termination of the Plan, all payroll deductions
not used to purchase Common Stock will be refunded without interest.

     (b) The Board of Directors reserves the right to amend the Plan from time
to time in any respect; provided, however, that no amendment shall be effective
without stockholder approval if the amendment would (a) except as provided in
Articles 3, 4, 24 and 25, increase the aggregate number of shares of Common
Stock to be offered under the Plan, or (b) change the class of employees
eligible to receive options under the Plan; provided, further, that so long as
there is a requirement under Rule 16b-3 under the Securities Exchange Act of
1934, as amended, for stockholder approval of the Plan and certain amendments
thereto, any such amendment which (a) materially increases the number of shares
of Common Stock which may be issued under the Plan, (b) materially increases the
benefits accruing to participants in the Plan or (c) materially modifies the
requirements as to eligibility for participation in the Plan, shall be subject
to stockholder approval.

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16.  Limitations of Sale of Stock Purchased Under the Plan.
     -----------------------------------------------------

     Common Stock purchased under the Plan by employees who are subject to
Section 16 of the Securities Exchange Act of 1934, as amended, may not be sold
for six (6) months after the Offering Termination Date on which such shares were
purchased, unless such transaction shall be exempt from Rule 16b-3 under the
Securities Exchange Act of 1934, as amended. Thereafter, such employees may sell
Common Stock purchased under the Plan at any time. Notwithstanding the
foregoing, because of certain Federal tax requirements, all employees will agree
by entering the Plan, promptly to give the Company notice of any such Common
Stock disposed of within two years after the Offering Commencement Date on which
the related option was granted showing the number of such shares disposed of.
The employee assumes the risk of any market fluctuations in the price of such
Common Stock. Certificates representing shares of Common Stock purchased under
the Plan will bear a legend reflecting the restrictions on transfer set forth
herein.

17.  Company's Payment of Expenses Related to Plan.
     ---------------------------------------------

     The Company will bear all costs of administering and carrying out the Plan.

18.  Participating Subsidiaries.
     --------------------------

     The term "participating subsidiaries" shall mean any subsidiary of the
Company which is designated by the Committee (as defined in Article 19) to
participate in the Plan.  The Committee shall have the power to make such
designation before or after the Plan is approved by the stockholders.

19.  Administration of the Plan.
     --------------------------

     (a) The Plan shall be administered by a committee of "disinterested"
directors as that term is defined in Rule 16b-3 under the Securities Exchange
Act of 1934, as amended, appointed by the Board of Directors of the Company,
which shall be the Company's Compensation Committee (the "Committee").  The
Committee shall consist of not less than three members of the Company's Board of
Directors.  The Board of Directors may from time to time remove members from, or
add members to, the Committee.  Vacancies on the Committee, howsoever caused,
shall be filled by the Board of Directors.  No member of the Committee shall be
eligible to participate in the Plan while serving as a member of the Committee.

     (b) The Committee shall select one of its members as chairman, and shall
hold meetings at such times and places as it may determine. Acts by a majority
of the Committee, or acts reduced to or approved in writing by a majority of the
members of the Committee, shall be the valid acts of the Committee.

     (c) The interpretation and construction by the Committee of any provisions
of the Plan or of any option granted under it shall be final. The Committee may
from time to time adopt such rules and regulations for carrying out the Plan as
it may deem best. With respect to persons

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subject to Section 16 of the Securities and Exchange Act of 1934, as amended,
transactions under the Plan are intended to comply with all applicable
conditions of Rule 16b-3 or its successors under said Act. To the extent any
provision of the Plan or action by the Committee fails to so comply, it shall be
deemed null and void, to the extent permitted by law and deemed advisable by
that Committee.

     (d) Promptly after the end of each Offering Period, the Committee shall
prepare and distribute to each participating employee in the Plan a report
containing the amount of the participating employee's accumulated payroll
deductions as of the Offering Termination Date, the Option Exercise Price for
such Offering Period, the number of shares of Common Stock purchased by the
participating employee with the participating employee's accumulated payroll
deductions, and the amount of any unused payroll deductions either to be carried
forward to the next Offering Period, or returned to the participating employee
without interest.

     (e) No member of the Board of Directors or the Committee shall be liable
for any action or determination made in good faith with respect to the Plan or
any option granted under it. The Company shall indemnify each member of the
Board of Directors and the Committee to the fullest extent permitted by law with
respect to any claim, loss, damage or expense (including counsel fees) arising
in connection with their responsibilities under this Plan.

20.  Optionees Not Stockholders.
     --------------------------

     Neither the granting of an option to an employee nor the deductions from
his or her pay shall constitute such employee a stockholder of the Company with
respect to the shares covered by such option until such shares have been
purchased by and issued to him or her.

21.  Application of Funds.
     --------------------

     The proceeds received by the Company from the sale of Common Stock pursuant
to options granted under the Plan may be used for any corporate purposes, and
the Company shall not be obligated to segregate participating employees' payroll
deductions.

22.  Governmental Regulation.
     -----------------------

     (a) The Company's obligation to sell and deliver shares of the Company's
Common Stock under this Plan is subject to the approval of any governmental
authority required in connection with the authorization, issuance or sale of
such stock.

     (b) In this regard, the Board of Directors may, in its discretion, require
as a condition to the exercise of any option that a Registration Statement under
the Securities Act of 1933, as amended, with respect to the shares of Common
Stock reserved for issuance upon exercise of the option shall be effective.

                                       8


23.  Transferability.
     ---------------

     Neither payroll deductions credited to an employee's account nor any rights
with regard to the exercise of an option or to receive stock under the Plan may
be assigned, transferred, pledged, or otherwise disposed of in any way by the
employee.  Any such attempted assignment, transfer, pledge, or other disposition
shall be without effect, except that the Company may treat such act as an
election to withdraw funds in accordance with Article 10.

24.  Effect of Changes of Common Stock.
     ---------------------------------

     If the Company should subdivide or reclassify the Common Stock which has
been or may be optioned under the Plan, or should declare thereon any dividend
payable in shares of such Common Stock, or should take any other action of a
similar nature affecting such Common Stock, then the number and class of shares
of Common Stock which may thereafter be optioned (in the aggregate and to any
individual participating employee) shall be adjusted accordingly.

25.  Merger or Consolidation.
     -----------------------

     If the Company should at any time merge into or consolidate with another
corporation, the Board of Directors may, at its election, either (i) terminate
the Plan and refund without interest the entire balance of each participating
employee's payroll deductions, or (ii) entitle each participating employee to
receive on the Offering Termination Date upon the exercise of such option for
each share of Common Stock as to which such option shall be exercised the
securities or property to which a holder of one share of the Common Stock was
entitled upon and at the time of such merger or consolidation, and the Board of
Directors shall take such steps in connection with such merger or consolidation
as the Board of Directors shall deem necessary to assure that the provisions of
this Article 25 shall thereafter be applicable, as nearly as reasonably
possible.  A sale of all or substantially all of the assets of the Company shall
be deemed a merger or consolidation for the foregoing purposes.

26.  Withholding of Additional Federal Income Tax.
     --------------------------------------------

     The Company will undertake such withholding in connection with the Plan as
it determines is appropriate, in its sole discretion.

27.  Approval of Stockholders.
     ------------------------

     The Plan shall not take effect until approved by the holders of a majority
of the outstanding shares of Common Stock of the Company, which approval must
occur no later than the end of the first Offering Period after the date the Plan
is adopted by the Board of Directors. Options may be granted under the Plan
prior and subject to such stockholder approval. If the Plan is not so approved
by the stockholders, all payroll deductions from participating employees shall
be returned without interest and all options so granted shall terminate.

This Plan was adopted by the Board of Directors on December 29, 2000.

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