O&G Flashcards
18 weeks ultrasound
Anatomy screen
18 weeks ultrasound
Anatomy screen
Normal fetal heart rate
110 to 160 bpm
Miscarriage definition
Loss of pregnancy before 20 weeks
BHCG pattern before 9 weeks
SHould double every 48 hours
BHCG after 9 weeks
Should plateau (hence not a good marker of fetal growth)
Causes of abnormally high BHCG
- Incorrect dates
- Molar pregnancy
- Twins
Implantation bleed
Light
10 days into pregnancy
Causes of abnormally low BHCG
Wrong dates
miscarriage
ectopic
(repeat after 48 hours)
Fetal heart beat should be seen by what gestation
7 weeks
Differntial diagnosis for PV bleeding in pregnancy
- Ectropion
- Polyps
- Infecton
- Cancer
- intercourse over last 24 hours
Investigations for early pregnancy bleeding
BHCG
USS
Threatened miscarriage Features
mild PVB no pain Closed cx Normal BHCG Normal USS Reassure and RhD test
Missed miscarriage definition
Mild to moderate PVB variable pain closed cx low BHCG Small or absent CRL absent fHR abnormal irregular gestation sac
Missed miscarriage management
Conservative
Medical: misoprostol loading dose
Surgical: D+C
RhD test
Incomplete miscarriage definition
Heavy bleeding with PVB Severe pain Open cx with clots and blood Low BHCG Blood, clots and placenta on USS
Incomplete miscarriage management
ABCDs/resus Surgical evacuation Mesoprostol remove tissue RhD status
Complete miscarriage definition
Heavy PVB which settles Severe pain which settles Open cx Low BHCG empty uterus
Complete miscarriage management
Reassurance
RhD
Ruptured Ectopic pregnancy presentation
minimal PVB Uncomfortable/peritonitic, agonising pain Normal cervix Low BHCG Empty uterus, fluid in POD, adnexal mass
Unruptured ectopic presentation
Mild PVB unilateral adnexl pain normal cx low BHCG empty uterus, adnexal mass
Ectopic management
ABCDs/ resus
Methotrexate and confrim BHCG decline
Salpingectomy
RhD
Molar pregnancy findings
mild PVB Pain Closed cx very high BHCG honey comb or snow storm appearance of uterine cavity
Molar pregnancy management
Surgica;: suction and curretage
Follow up BHCG till 0
Histology to determine if complete or partial mole
Can fall pregnant only after 1 year
Anti D timing
After 72 hours
Ectopic risk factors
IUCD
Fallopian tube integrity impaired
Molar pregnancy definition
Proliferation of trophoblast from placenta
Increased risk of choriocarcinoma in complete mole
Molar pregnancy epidemiology
Asian population
Definition of term gestation
37 to 42.6 weeks