KA3- Male And Female Infertility

Question 1

1) Ovulation is stimulated by … 16

Answer 1

drugs that prevent the negative feedback effect of oestrogen on FSH secretion

Question 2

2) Other ovulatory drugs that… 11 These drugs can cause… result.. 21

Answer 2

mimic the action of FSH and LH
super ovulation that can result in multiple births or be used to collect ovaries for OVF programmes

Question 3

3) Artificial insemination: … used when… 22 If a partner is sterile…13 Semen is… 10

Answer 3

several samples of semen are collected over a period of time and is used when a male has a low sperm count
a donor can be used to provide semen
released into females cervix during her fertile period

Question 4

4) Intra-cytoplasmic sperm injection: If… 10 The head of the… 19

Answer 4

mature sperm are defective or in very low number
sperm is drawn into a needle and injected directly into the egg to achieve fertilisation

Question 5

5) In vitro fertilisation: surgical …9 Eggs mixed.. allow… 16 Fertilised eggs are…12 The embryos are then… 10

Answer 5

removal of eggs from ovaries after hormone stimulation
with sperm in a culture dish of nutrient medium to allow fertilisation to occur
incubated until they have formed at least 8 cells
transferred to the uterus for implantation

Question 6

6) During IVF treatment … can be carried out to … 19 —> This allows scientists to… 20

Answer 6

Pre-Implantation Genetic Diagnosis can be carried to identify single gene disorders and chromosomal abnormalities
identify embryos which should and should not be allowed to become implanted in the mothers endometrium