Women's Health : Early Pregnancy Flashcards
What is the definition of a miscarriage?
Spontaneous loss of pregnancy before 24 weeks of gestation.
Name some causes of miscarriage.
Chromosomal abnormalities, hormonal factors, thrombophilia/autoimmunity, anatomical factors, infection.
What is the most common cause of miscarriage?
Chromosomal abnormalities, typically autosomal trisomies.
Why can chromosomal abnormalities cause miscarriage?
Chromosomal abnormalities can result in failure of development of embryo within gestational sac.
Name two hormonal factors that can lead to miscarriage.
PCOS, hyperprolactinaemia, diabetes, hyper/hypothyroidism.
What autoimmune condition can induce placental thromboses, leading to placental insufficiency?
Antiphospholipid syndrome, factor V Leiden - induces placental thromboses leading to placental insufficiency.
What type of anatomical factors can lead to miscarriage?
Bicornuate uterus, cervical insufficiency.
Which infections can lead to miscarriage?
Toxoplasmosis, syphilis.
List two risk factors for miscarriage.
Increased maternal age and previous miscarriage.
List some types of miscarriage.
Threatened, incomplete, complete, missed, inevitable.
Define a ‘threatened miscarriage.’
Vaginal bleeding in the first 24 weeks of pregnancy (with viable intrauterine pregnancy).
Define an ‘Incomplete miscarriage.’
Non-viable pregnancy, bleeding begun, products of conception in uterus.
Define a ‘Complete miscarriage.’
All products of conception passed, bleeding has stopped.
Define a ‘Missed miscarriage.’
Non-viable pregnancy on ultrasound (without pain / bleeding).
Mean gestational sac diameter >25mm with no yolk sac or CRL >7mm with no cardiac activity.
Define an ‘Inevitable miscarriage.’
Non-viable pregnancy, bleeding begun, cervical os opened, POCs remain in uterus.
What type of miscarriage involves all products of conception being passed and bleeding stopping?
Complete miscarriage.
Fill in the blank: A missed miscarriage is diagnosed by a mean gestational sac diameter of >___ mm without a yolk sac or CRL >___ mm without cardiac activity.
25 mm; 7 mm.
Presentation of miscarriage
Pelvic pain, vaginal bleeding.
Differentials of bleeding in early pregnancy
The commonest causes of bleeding in early pregnancy are miscarriage, gestational trophoblastic disease, implantation bleeding, ectopic pregnancy, and importantly, bleeding without an identified cause.
How is a miscarriage diagnosed?
Transvaginal ultrasound scan - to identify location, foetal pole and heartbeat.
How is a threatened miscarriage managed if there is no history of previous miscarriage?
Conservative management: Advise returning if bleeding persists after 14 days or becomes heavier.
How is a threatened miscarriage managed if there is a history of previous miscarriage?
Offer vaginal progesterone until 16 weeks of pregnancy completed.
Once the bleeding has stopped, what should the patient (suspecting miscarriage) do?
Take a pregnancy test 3 weeks after the bleeding has stopped.
If the bleeding is ongoing, offer __ ______ _____.
A repeat scan.
First line management of Incomplete/Inevitable Miscarriage
Expectant management (appropriate to 13 weeks gestation): Allow 7-14 days for POCs to pass / bleeding to end.
Second line management of Incomplete/Inevitable Miscarriage
Medical management: mifepristone, followed by misoprostol 48 hours later.
Alternative second line management of Incomplete/Inevitable Miscarriage
Surgical management: Vacuum aspiration under local or dilatation and evacuation under GA.