The Biology Of Controlling Fertility

Question 1

How are males fertility described

Answer 1

Continuous

Question 2

How are men always fertile

what does the pituitary gland do

Answer 2

Hormones (FSH AND ICSH) are maintained at a constant level which results in steady production of testosterone.

Question 3

How are females fertility described

Answer 3

Cyclical

Question 4

When are females most likely to conceive

Answer 4

In a fertile period ( lasts about 5 days)

Question 5

How can a female tell when she is ovulating

Answer 5

Rise in body temperature slightly and cervical mucus is thinned to make it easier for sperm

Fertile period is roughly 6-10 days after period

Question 6

What is the cause of failure to ovulate

Answer 6

Pituitary gland fails to release FSH and LH

You can get drugs to mimic these hormones though this can cause super ovulation

Question 7

Describe artificial insemenation

Answer 7

Semen is collected and put in a syringe and inserted in a female without intercourse

Useful for men with a low sperm count or can get a sperm donor

Question 8

Describe IVF

Answer 8

Can be caused by a blockage in oviduct, perhaps because of a PID or chlamydia. Ova are surgically removed after stimulation of hormones. Mixed with sperm outside body and put eggs back in female

Question 9

Describe ICSH

Answer 9

One sperm per ovum needed. Head of a sperm is drawn in a needle and injected in ova

Question 10

What is a PGD

Answer 10

Check for abnormalities

Question 11

Name methods of contraception

Answer 11

Condom
IUD
vasectomy
Tubal ligation
Pill to stop FSH AND LH- thickens mucus
Diaphragm

Question 12

Risks and ethics of some treatments for infertility

Answer 12

• multiple births
• ovarian hyper-stimulation ( enlarges and fluid filled)
• chance of ovarian cysts

PGD
- wrong to interfere with abnormalities