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Flashcards in Exam one Deck (27)
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1

First menstruation

Menarche

2

Average duration of menstrual flow

5 days

3

Average blood loss during menstruation

50 mL

4

What happens when fertilization and implantation don't occur

Regression of the corpus luteum

5

When do estrogen levels drop

After ovulation

6

The growth and maturation of a mature egg

Follicular Phase

7

The rupture of a mature egg from the ovum

Ovulation

8

The egg ruptures in response to what?

A surge of luteinizing hormone

9

Begins at ovulation and lasts until the menstrual phase of the next cycle

Luteal phase

10

Corpus luteum

The shell that housed the mature eggs, secretes progesterone

11

Menstrual Phase

Initiated by periodic vasoconstriction in the upper layers of the endometrium, sheds the functional 2/3 of the endometrium

12

Proliferative Phase

A period of rapid growth lasting from about the 5th day to the time of ovulation, thickening occurs, depends on estrogen stimulation

13

Secretory Phase

From the day of ovulation to about 3 days before the next menstrual period, large amounts of progesterone and estrogen are produced, an edematous, vascular, functional endometrium is now apparent, suitable protective and nutritive bed for a fertilized ovum

14

Ischemic Phase

If fertilization and implantation do not occur, the corpus luteum, which secretes estrogen and progesterone, regresses. Decrease in estrogen and progesterone levels cause necrosis to develop, menstrual bleeding begins marking day 1 of the next cycle

15

Conception

The union of a single egg and sperm marks the beginning of a pregnancy, fertilization takes place in the ampulla of the fallopian tube

16

Embryo stage

From day 15 until approximately 8 weeks after conception

17

When is the most critical time in the development of the organ systems and the main external features?

Embryonic stage

18

Amnion

Inner membrane

19

Chorion

Outer membrane, surrounds the amnion.

20

When do the two fetal membranes begin to form around the developing embryo?

At the time of implantation

21

What forms the fluid-filled sac around the embryo?

Amnion membrane

22

Amniotic fluid increases how much weekly?

700-1000mL by term

23

Oligohydramnios

Less than 300 mL of amniotic fluid

24

Polyhydramnios (hydramnios)

More than 2 L of amniotic fluid

25

What forms the umbilical cord?

Amnion membrane

26

Whartons' jelly

Specialized connective tissue that surrounds the 3 vessels

27

What 3 vessels are in the umbilical cord?

2 arteries, 1 vein
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