The biology of controlling fertility Flashcards Preview

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Flashcards in The biology of controlling fertility Deck (22):
1

infertility treatments and contraception are based on

the biology of fertility

2

Males are constantly

fertile

3

females fertility is cyclical and most fertile period is a

few days before 1-2 days after ovulation

4

The time of ovulation can be estimated by the:

0.5 body temperature increase
thinning of cervical mucus

5

female infertility drugs can be used

to stimulate ovulation

6

ovulation or fertility drugs can be used

to stimulate ovulation

7

some ovulatory drugs work by preventing the negative feedback effect of

of oestrogen on FSH

8

some ovulation drugs mimic the action of

FSH and LH

9

ovulatory drugs can cause super ovulation, which can result in

multiple births

10

ovulatory drugs can be used to collect ova for

in vitro fertilisation (IVF)

11

Artificial insemination is a treatment

in which semen is inserted into female reproductive tract without intercourse.

12

male;
Artificial insemination is particularly

useful where the male has low sperm count

13

Artificial insemination involves

collecting and combining several samples of semen over period of time

14

If a male partner is infertile (sterile) sperm form

a donor may be used

15

IVF involves the surgical removal

of eggs from ovaries after hormone stimulation,

16

intracytoplasmic sperm injection (ICSI), can be used during IVF treatment , if

mature sperm are defective or very low in number

17

ICSI involves the head of sperm

being drawn into a needle and injected directly into the egg to achieve fertilisation

18

Pre-implantation genetic diagnosis (PGD)

is used in conjunction with IVF to identify single gene disorders and chromosome abnormalities

19

methods of contraception act by preventing

fertilisation or implantation

20

methods of contraception

physical & contraception

21

physical methods of contraception

intrauterine devices (IUD)
condom
diaphragm
cervical cap
sterilisation

22

chemical methods of contraception

hormonal methods
-combinations of synthetic hormones
-mimic negative feedback by preventing release of FSH/LH
-some prevent implantation( morning after school)
-some cause thickening of cervical mucus (progesterone)