Contraception

Question 1

By what mechanisms does the COCP cause increase risk of thrombosis

Answer 1

Increased platelet count
Increased platelet adhesiveness
Decreased antithrombins
Increased clotting factors
Increased prothrombin
Increased fibrinogen

Question 2

Mechanism of action of the emergency contraceptive pill

Answer 2

Delay ovulation
Increased tubal peristalsis
Makes the endometrium unfavourable to implantation

Question 3

Mechanism of action of the emergency IUCD

Answer 3

Prevents implantation

Question 4

What are the 3 phases of the menstrual cycle

Answer 4

1. Follicular (pre-proliferative)
2. Ovulation
3. Luteal phase

Question 5

What happens to oestrogen levels in the first 14 days of the cycle

Answer 5

Rise and peak on day 14

Question 6

Average menstrual blood loss

Answer 6

40-80ml

Question 7

Mechanism of action of progesterone only methods

Answer 7

Thicken cervical mucus
Lesser effect on tubal motility and endometrium
DMPA suppresses ovulation

Question 8

Ideal use failure rate of POP

Answer 8

2%

Question 9

Ideal use failure rate of DMPA

Answer 9

0.3%

Question 10

Ideal use failure rate of IUS

Answer 10

0.2$

Question 11

Disadvantages of progesterone only methods

Answer 11

Irregular bleeding
hormone side effects
DMPA delays return of fertility
DMPA can cause weight gain