, and add eight days on account of the possibility of it
occurring within that period. The heavier the child the longer is the
duration; the younger the woman the longer time it often requires. The
duration is longer in married than in unmarried women; the duration is
liable to be longer if the child is a female.

3. MOVEMENT.--The first movement is generally felt on the 135th day
after impregnation.

4. GROWTH OF THE EMBRYO.--About the twentieth day the embryo resembles
the appearance of an ant or lettuce seed; the 30th day the embryo is
as large as a common horse fly; the 40th day the form resembles that
of a person; in sixty days the limbs begin to form, and in four months
the embryo takes the name of foetus.

5. Children born after seven or eight months can survive and develop
to maturity.

[Illustration: DURATION OF PREGNANCY.]

DIRECTIONS.--Find in the upper horizontal line the date on which
the last menstruation ceased; the figure beneath gives the date of
expected confinement (280 days).

Jan. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
Oct. 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22

Jan. 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
Oct. 23 24 25 26 27 28 29 30 31 1 2 3 4 5 6 7 Nov.

Feb. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
Nov. 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22

Feb. 16 17 18 19 20 21 22 23 24 25 26 27 28
Nov. 23 24 25 26 27 28 29 30 1 2 3 4 5 6 7 Dec.

Mar. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
Dec. 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20

Mar. 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
Dec. 21 22 23 24 25 26 27 28 29 30 31 1 2 3 4 5 Jan.

Apr. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
Jan. 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20

Apr. 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
Jan. 21 22 23 24 25 26 27 28 29 30 31 1 2 3 4 5 Feb.

May 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
Feb. 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22

May 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
Feb. 23 24 25 26 27 28 29 30 31 1 2 3 4 5 6 7 Mar.

June 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
Mar. 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22

June 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
Mar. 23 24 25 26 27 28 29 30 31 1 2 3 4 5 6 Apr.

July 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
Apr. 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21

July 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
Apr. 22 23 24 25 26 27 28 2