Bleeding in Early Pregnancy Flashcards
(46 cards)
When does the first trimester of pregnancy end?
13 weeks
When does the second trimester of pregnancy end?
28 weeks
How is gestation determined on USS?
head to bum ratio
Where does fertilisation ovvur?
fallopian tube
What is an ectopic pregnancy?
abnormal site of implantation
What is a molar pregnany?
abormal embryo
How common is bleeding in early pregnancy?
very common-20%
What are the causes of bleeding in early pregnancy?
miscarriage; ectopic; molar; implantation bleedings; chorionic haematoma; cervical and vaginal (infection; malignancy; polyp); haematuria; PR
What are the other common symptoms associated with bleeding in early pregnancy?
pain; hyperemesis; dizziness/fainting
What are the symptoms of miscarriage?
positive UPT; bleeding primary symptom >cramping
What is a threatened miscarriage?
os closed but there is a risk of pregnnacy
What is an inevitable miscarriage?
products are sited at open os
What is a complete miscarriage?
products are in the vagina
What are the causes of miscarriage?
embryonic abnormality; immunologic (APS); infection; environmental; severe emotional upsets; iatrogenic; associations with smoking, cocaine, alcohol misuse
What infections are implicated in miscarriage?
CMV; rubella; toxoplasmosis; listeria
What is a complete miscarriage?
all of pregnancy lost; uterus is empty
What is early fetal demise?
pregnancy-in-situ, no heartbeat. MSD>25mm; FP>7mm
What is MSD?
mean sac diameter
What is FP?
fetal pole
What is the pathophysiology of miscarraige?
bleeding from placental bed or chorion causing hypoxia and villous/placental dysfunction
What is recurrent miscarriage defined as?
3 or more pregnancy losses
What are the causes of recurrent miscarriage?
antiphsopholipid syndrome; thrombophilia; balanced translocation
What are the independent risk factors for recurrent miscarriage?
age and prevsious miscarriages
Where is the most common site of ectopic pregnancy?
fallopian tubes