Reproductive Lecture 2 ๐Ÿฆ‹๐Ÿฌ Flashcards

1
Q

Mature oocyte is released every

A

28 days

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2
Q

The female reproductive organs

A

Vagina
Uterus
Uterine (fallopian) tubes
Ovaries

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3
Q

Anteflexion or retroflexion?

About 20%

A

retroflexed uterus, which could cause some pain during menstruation or intercourse

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4
Q

The vagina

A

An elastic muscular 7.5-9.0 cm tube extending from the cervix to the exterior of the body

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5
Q

three main functions of The vagina

A

. passageway for the elimination of menstrual fluid.
. receives the penis during sexual intercourse, and holds spermatozoa before they pass into the uterus.
. forms the lower portion of the birth canal through which the fetus passes during delivery.

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6
Q

Predicting fetal growth

A

Fundal height
Top of the uterus to the pubic bone
Number of centrimetres is approximately the number of weeks gestation

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7
Q

Predicting fetal growth increased

A

with twins, breech birth, gestational diabetes

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8
Q

Predicting fetal growth decreased

A

for small for gestational age and intrauterine growth restriction

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9
Q

The uterus

A

Pathway for sperm transport

Provides mechanical protection, nutritional support, and waste removal for the developing embryo and fetus.

Contractions in the muscular wall (myometrium) of the uterus are important in ejecting the fetus at the time of birth.

Source of menstrual fluid

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10
Q

The uterus

The endometrium can be subdivided into:

A

. Inner functional zone (stratum functionalis), that contains most of the uterine glands.

.Outer basilar zone (stratum basalis; adjacent to the myometrium). The basilar zone attaches the endometrium to the myometrium.

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11
Q

The uterine (fallopian) tube

A

The uterine tube provides a rich, nutritive environment containing lipids and glycogen, for spermatozoa, oocyte and the developing embryo.

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12
Q

Fertilisation typically occurs

A

in the ampulla

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13
Q

The epithelium lining of the uterine tube has both

A

ciliated and nonciliated secretory columnar cells

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14
Q

The mucosa is surrounded by

A

concentric layers of smooth muscle

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15
Q

Transport along the tube involves a combination of both

A

ciliary movement and peristaltic contractions

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16
Q

Ectopic pregnancy

A

When the fertilised embryo is implanted in any tissue other than the uterine wall

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17
Q

Where do most ectopic pregnancies occur ?

A

Most ectopic pregnancies occur in the uterine tube (tubal pregnancy)

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18
Q

What are the risk factors for ectopic pregnancyโ€™s

A

Smoking, advanced maternal age and prior tubal damage are risk factors

19
Q

The Ovary is comprised of three distinct regions

A

1 Outer ovarian cortex containing the ovarian follicles

2 Central ovarian medulla consisting of ovarian stroma and steroid producing cells

3 Inner hilum (hilus) which acts as a point of entry for nerves and blood vessels

20
Q

How is the Primordial follicle formed?

A

The oocyte once surrounded by follicular (granulosa) cells form the primordial follicle.

21
Q

How is the Primary follicles formed ?

A

As the follicles grow, they are called primary or pre-antral follicles. Immature primary follicles consist of only one layer of granulosa cells.

22
Q

How is the zona pellucida formed

A

The oocyte secretes glycoproteins, which form a translucent acellular layer (zona pellucida).

23
Q

Condensation of ovarian stromal cells, known as

A

thecal cells

24
Q

follicle development why do follicles get larger

A

In response to FSH, some follicles get larger producing many layers of granulosa cells surrounding the oocyte.

25
Q

How are Secondary follicle made?

A

As granulosa cells proliferate they produce a viscous follicular fluid that coalesces to form a single follicular antrum. These are called secondary or antral follicles.

26
Q

How is the corona radiata made?

A

The innermost layer of granulosa cells becomes firmly attached to the zona pellucida and is called the corona radiata

27
Q

What is the cumulus oophorus

A

Mass of loosely associated granulosa cells is known as the cumulus oophorus

28
Q

How did the theca interna, formed

A

The theca develops to become the inner glandular, highly vascular theca interna,

29
Q

How did the theca externa, formed

A

theca interna. and the surrounding fibrous capsule, the theca externa.

30
Q

Mature (Graafian or pre-ovulatory) follicle

As the follicular antrum grows,

t is connected to the rim of peripheral granulosa cells by

A

the oocyte becomes suspended in fluid

a thin stalk of cells.

31
Q

Ovulation

When dose the follicle bulge out from the ovarian surface.?

A

The increasing size of the follicle and its position in the cortex of the ovarian stroma causes it to bulge out from the ovarian surface.

32
Q

The follicle ruptures, carrying with it the oocyte and itsโ€ฆ

A

surrounding mass of cumulus cells.

33
Q

The oocyte is collected byโ€ฆ.

A

cilia on the fimbria, which sweep the cumulus mass into the uterine tube.

34
Q

Corpus Luteum

The antrum breaks downโ€ฆ.

A

the basement membrane between the granulosa and thecal layers breaks down and blood vessels invade.

35
Q

The granulosa cells form large lutein (yellow pigment) cells (Corpus luteum =

A

yellow body

36
Q

Corpus Albicans

A

The whitish scar tissue remaining,

white body), is absorbed back into the stromal tissue of the ovary over weeks to months.

37
Q

This hormone is produced by the chorion of the embryo beginning about 8 days after fertilisation.

A

human chorionic gonadotropin (hCG)

38
Q

hormone detected by home pregnancy tests.

A

The presence of hCG in maternal blood or urine is an indicator of pregnancy

39
Q

The average menstrual cycle is about

A

28 days

40
Q

Two phases in the ovarian cycle

A

follicular phase (day 1 to ovulation) and luteal phase (ovulation to menstruation)

41
Q

Three phases in the uterine/menstrual cycle

A

menstruation, proliferative and secretory

42
Q

Variation in length of menstrual cycle

The length of the luteal phase is usually 14 days. Which length is variable

A

The length of the follicular phase is variable, and changes as a women ages.

43
Q

The female reproductive tract has two main functions

A

Produce oocyte

Incubate embryo

44
Q

High levels of oestrogen exert a positive feedback effect on the

A

hypothalamus and anterior pituitary, thereby increasing secretion of GnRH and LH.