hormones and reproduction

Question 1

oestrogen

Answer 1

eggs begin to mature and release, OVULATION

Question 2

testosterone

Answer 2

produced by testes and stimulates sperm production

Question 3

FSH

Answer 3

• secreted by pituitary gland
• causes eggs to mature in ovaries
• stimulates ovaries to produce oestrogen

Question 4

oestrogen

Answer 4

• secreted by ovaries
• inhibits FSH release
• stimulates LH release
• makes lining of uterus grow again after menstruation

Question 5

LH (luteinising hormone)

Answer 5

• secreted by pituitary gland

- stimulates release of egg from ovary

Question 6

progesterone

Answer 6

• secreted by empty follicle in ovaries
• maintains lining of uterus during second half of cycle
• inhibits FSH and LH release

Question 7

hormonal methods to reduce fertility

Answer 7

• oral contraceptives (THE PILL) that contain oestrogen and progesterone which inhibits FSH production so no eggs are released
• injection, skin patch

Question 8

non hormonal methods to reduce fertility

Answer 8

• condoms
• intrauterine devices, prevent embryos from implanting in uterus
• spermicidal creams which kill/disable sperm
• sterilisation

Question 9

in vitro fertilisation (IVF) treatments involves:

Answer 9

• giving a woman FSH and LH to stimulate growth of many eggs
• collecting eggs from woman
• fertilising eggs with sperm from father
• inserting one or two embryos into woman’s uterus

Question 10

weaknesses of fertility treatment (increasing)

Answer 10

• emotionally and physically stressful
• success rates are not high
• lead to multiple births