Obs Hx

Question 1

How would you calculate EDD using Nagle’s method?

Answer 1

subtract 3 months from LMP + 7 days + 1 year

Question 2

What factors could make the EDD less accurate?

Answer 2

1. if cycle is >28 days
2. if cycle is <28 days
3. if women has stopped combined oral contraceptive

Question 3

What’s the most accurate way to measure gestational age?

Answer 3

USS between 11 and 13+6 weeks

Question 4

What are other methods of estimating gestational age?

Answer 4

9-14 weeks = crown-rump length measurement

14-20 weeks = head circumference

Question 5

What are the main components of an antenatal obstetric hx?

Answer 5

Presenting Complaint
Hx of Presenting Complaint
Past Obstetric Hx - parity, gravidity

Past Gynae Hx

Past Med Hx

Systems review

Drugs Hx

Fhx

Social Hx

Question 6

What are the main components of a postnatal obstetric Hx?

Answer 6

Number of days since delivery?

Gestation and mode of delivery, if caesarean, why?

mode of onset - spontaneous or induced?

length of labour? analgesia?

blood loss?

Infant hx - birth weight, Apgar score, cord pH, mode of feeding?

Puerperium hx - lochia, opened bowels?, urine, pain?

drugs

contraception?

hx of pregnancy and obstetrics

social hx

VTE risk

Question 7

What contraception suitable for mothers who are breast-feeding?

Answer 7

1. progesterone- only is suitable if breast feeding

2. combined - after 4 to 6 weeks if bottle feeding