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Y3 Reproductive > Pregnancy Physiology > Flashcards

Flashcards in Pregnancy Physiology Deck (123)
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1

When in the menstrual cycle are you fertile?

When ovulating + few days before day11-15

2

How long can an ovum live in the female genital tract?

17-24hr

3

How long can sperm live in the female genital tract?

5 days

4

What changes happens to cervical mucus pre-fertilisation?

Thins (for sperm passage)

5

When an ovum (secondary oocyte) is released from the ovary, how does it travel to the uterus?

Ciliated epithelium propel the ovum down the uterus tubes

6

Where is the commonest site of fertilisation?

Uterine tube ampulla

7

Sperm touching the ____ triggers a ____ reaction

Sperm touching the ZONA PELLUCIDA triggers a ACROSOME reaction

8

Acrosomal digestive enzymes allow _____ of the sperm

penetration

9

After the sperm penetrates the zona pellucida, the ____ fuse and the egg becomes a ______

After the sperm penetrates the zona pellucida, the NUCLEI fuse and the egg becomes a ZYGOTE

10

Is a zygote diploid or haploid?

Diploid

11

On what days post fertilisation does the zygote migrate to uterine cavity?

3 - 5

12

As the zygote migrates to the uterine cavity, what does it become?

Morula > blasocyst

13

What are the main parts of a blastocyst?

Inner cell mass
Outer trophoblasts

14

What does the inner cell mass of the blastocyst give rise to?

Fetus

15

What do the outer trophoblast cells of the blastocyst give rise to?

Placenta

16

On what day post fertilisation does implantation occur?

5 - 8

17

In implantation, the trophoblast cells penetrate the _______, and the ______ degenerates. By day ______ the blastocyst is completely buried in endometrium

In implantation, the trophoblast cells penetrate the ENDOMETRIUM DECIDUA, and the ZONA PELLUCIDA degenerates. By day 12 the blastocyst is completely buried in endometrium

18

What process describes changes to the endometrium in preparation for and during pregnancy?

Decidualisation

19

What is chromosomal sex?

22 homologous pairs + XX or XY

20

What determines male development?

Presence of sex determining region on Y chromosome

21

What is the function of the SRY gene - sex determining region on Y chromosome?

Stimulates bipotential gonad to differentiate to testis

22

In early male development, what do the testis secrete that causing male genital tract development?

Testosterone and Mullerian inhibiting factor (aka AMH)

23

The male reproductive tract is a differentiated form of which primitive tract?

Wolffian duct

24

In early female development, what does the bipotential gonad give rise to?

Becomes ovaries (in absence of testosterone)

25

The female reproductive tract is a differentiated form of which primitive tract?

Mullerian duct

26

At what week gestation does male / female differentiation occur?

9wk

27

At what week gestation can you recognise sex on US?

16wk

28

From what week gestation is the placenta functional?

5

29

What is the function of the intervillous space in the placenta?

Separates mother’s/fetal blood

30

Carbamazepine, tetracyclines, heroin, and nicotine are all ____

teratogens