bleeding in early pregnancy Flashcards
when does the first trimester complete
13 weeks
when does the 2nd trimester complete
28 weeks
when does the 3rd trimester complete
40 weeks
what are abnormal pregnancy outcomes
miscarriage (normal embryo) ectopic pregnancy (abnormal site of implantation) molar pregnancy (abnormal embryo)
causes of early bleeding
implantation bleeding
chorionic haematoma
cervical infection, malignancy or polyps
vaginal infection or malignancy (rare)
unrelated bleeding (haematuria, PR bleeding)
other symptoms associated with early bleeding
pain (cramps)
hyperemesis
dizziness/fainting
symptoms of miscarriage
positive UPT
varied gestation
bleeding primary symptoms (> cramping)
what might speculum show in a miscarriage
closed os (threatened miscarriage)
products sited at open os (inevitable)
products in vagina (complete)
causes of miscarriage
embryonic abnormality (chromosomal)
immunologic (APS)
infections (CMV, rubella, toxoplasmosis, listeria)
environmental
severe emotional upsets
iatrogenic after CVS (infection or uterine irritability)
associated with smoking, cocaine, alcohol misuse
pathophysiology of miscarriage
bleeding from placental bed or chorion causing hypoxia and villous/placental dysfunction
how are miscarriages classified
threatened miscarriage (risk to pregnancy) inevitable miscarriage (pregnancy can't be saved) incomplete miscarriage (part of pregnancy lost already) complete miscarriage (all of pregnancy lost, uterus is empty) early foetal demise (pregnancy in situ, no heartbeat)
how is recurrent miscarriage defined
3 or more pregnancy losses
which autoimmune condition is associated with recurrent miscarriage
antiphospholipid syndrome
causes of recurrent miscarriage
APS thrombophilia balanced translocation uterine abnormality (late first trimester losses) age previous miscarriages
what is ectopic pregnancy
implantation outwith uterus
what is the most common site of ectopic pregnancy
Fallopian tube
less common sites of ectopic pregnancy
ovary
peritoneum
liver
cervix
presentation of ectopic pregnancy
pain > bleeding
dizziness/collapse
shoulder tip pain
SOB
signs of ectopic pregnancy
pallor
haemodynamic instability
peritonism
guarding and tenderness
USS findings in ectopic pregnancy
empty uterus/psuedo sac
mass is adenexa
free fluid in pouch of Douglas
management of ectopic pregnancy
surgical management if acutely unwell
medical management if woman is stable, low levels of bhCG and ectopic is small and unruptured
what is a molar pregnancy
a non-viable fertilised egg that implants into the uterine wall, resulting in overgrowth of placental tissue with chorionic villi swollen with fluid
gestational trophoblastic disease
what are the two types of molar pregnancy
complete
partial
complete molar pregnancy comes with an increased risk of
choriocarcinoma
what is complete molar pregnancy
egg without DNA
1 or 2 sperms fertilise, result in diploidy (paternal contribution only)
no fetus
overgrowth of placental tissue
what is partial molar pregnancy
haploid egg
1 sperm (reduplicating DNA material) or 2 sperms fertilising egg, result in triploidy
may have foetus
overgrowth of placental tissue
presentation of molar pregnancy
hyperemesis
varied bleeding and passage of ‘grape-like tissue’
SOB
USS appearance of molar pregnancy
snow storm appearance
when does implantation bleeding occur
10 days post ovulation
with the fertilised egg implants onto the uterine wall
describe the appearance of implantation bleeding
light/brownish and limited
what is chorionic haematoma
pooling of blood between endometrium and the embryo due to separation (subchorionic)
signs of chorionic haematoma
bleeding
cramping
threatened miscarriage
management of chorionic haematoma
usually self limiting and resolve
reassurance and surveillance
risks of large chorionic haematomas
infection
irritability (cramping)
miscarriage
cervical causes of bleeding in early pregnancy
ectopy
infections (chlamydia, gonococcal, bacterial)
polyp
malignancy (growth or generalised angry erosion)
history of missed attendance at colposcopy/never had a smear
vaginal causes of bleeding in early pregnancy
infections (trichomoniasis, bacterial vaginosis, chlamydia)
malignancy (ulcers)
forgotten tampon
unrelated causes of bleeding in early pregnancy
urinary (bladder infection with haematuria)
bowel (haemorrhoids, rarely malignancy)