Gynae Flashcards
(188 cards)
Menstrual cycle - HPO axis
*Effect of oestrogen on pituitary hormones switches when concentration increases beyond a threshold

What are the 2 phases of the menstrual cycle?
Follicular phase and luteal phase

How long does follicular phase last?
From day 1 of menstrual cycle up to ovulation (approx 14 days)
What happens during follicular phase?
LH and FSH stimulates growth of follicles in the ovaries.
Follicular growth produces oestrogen -> oestrogen builds endometrium
What are the LH and FSH levels during follicular phase?
Oestrogen release from follicle is gradually increasing - whilst it is still low, LH and FSH production is inhibited thus decrease
Once oestrogen past critical threshold, positive feedback effect and surge in LH and FSH (LH much higher)
What does surge in LH trigger?
Ovulation
What happens in ovulation?
A maure egg is released from the ovary
What happens during luteal phase?
Follicle that has released its egg becomes corpus luteum –> progesterone release
Progesterone maintains endometrial lining
Why does endometrial lining break down?
No implantation + corpus luteum is out of progesterone (has enough for 14 days)
Differentials for bleeding + abdo pain in early pregnancy
- Ectopic pregnancy
- Miscarriage
Ectopic pregnancy
Implantation of a conceptus outside uterine cavity
Ectopic pregnancy clinical features
- Lower abdo pain (often to one side)
- PV bleeding
Ectopic pregnancy RFs
- Previous abdo/pelvic surgery (adhesions)
- IUD
- PID
- Assisted conception
- Progesterone only pill
Ectopic pregnancy Ix
- Urien B-hCG
- TV USS (empty uterus, free fluid in pouch of Douglas)
- Serum B-hCG
Ectopic pregnancy Mx - 3 categories
Expectant
Medical
Surgical
When to consider expectant management for ectopic pregnancy?
- Clinically stable
- Pain free
- Ectopic ≤ 35mm w/o heartbeat
- Serum hCG ≤ 1000IU/L
- Able to return for follow up
Expectant mx for ectopic pregnancy
- Repeat serum hCG on days 2, 4, 7
- Ensure downtrending - ≥15% drop on e/ occasion
When to consider medical management for ectopic pregnancy?
- Significant pain
- Ectopic ≤ 35mm w/o heartbeat
- Serum hCG ≤ 1500IU/L
- No intrauterine pregnancy
- Able to return to follow up
Medical Mx ectopic pregnancy
IM Methotrexate
Management of ectopic pregnancy
hCG 1500-5000 w/o heartbeat
Offer either medical or surgical
When to consider surgical mx for ectopic pregnancy?
- Significant pain
- Ectopic >35mm
- Ectopic with hearbeat
- hCG ≥ 5000IU/L
Surgical Mx of Ectopic pregnancy
Salpingectomy
(affected fallopian tube removed)
+ anti D prophylaxis for anti D-ve mums
How long after methotrexate should you wait to conceive?
At least 3/12
Ruptured ectopic pregnancy Mx
Definitive:
Diagnostic laparoscopy w/ views towards laparoscopic salpingectomy
- Admit pt to ward
- Escalate to gynae seniors
- A to E approach (2x large bore cannulae + G&S +/- IV Hartmanns)
- Consent pt for surgery
- Speak to ER theatre team
- On call anaesthetist to see pt
- Prep pt for surgery (NBM, cross match 4 units blood)



