Early Pregnancy Problems Flashcards
DIAGNOSIS OF PREGNANCY
history
- Menstrual history - Describe menstrual pattern, Date of onset of last menses, duration, flow, frequency, Atypical last menstrual period, contraceptive use, irregular menses
- Rising hCG, empty uterus, abdominal pain, vaginal bleeding – ectopic
- Classic presntation – amenorhoea, nausea, vomiting, generalised malaise, breast tenderness
- Examination – enlarged uterus, brast changes, softening and enlargement of cervix (hegar sign at 6 weeks)/ chadwick sign (blue discolouration of cervix) / uterus may be palpable low in abdomen if progressed far enough by 12 weeks
DIAGNOSIS OF PREGNANCY
laboratory evaluation
- hCG
- corticotropin-releasing hormone, gonadotropin-releasing hormone, thyrotropin-releasing hormone, somatostatin, corticotropin, human chorionic thyrotropin, human placental lactogen, inhibin/activin, transforming growth factor-beta, insulinlike growth factors 1 and 2, epidermal growth factor, pregnancy-specific beta-1 glycoprotein, placental protein 5, and pregnancy-associated plasma protein-A.
- progesterone – evaluating abnormal early pregnancy, produced by corpus luteum, viable pregnancy diagnosed with levels grater than 25ng/mL
- early pregnancy factor – earliest available marker to indicate fertilisation detectable 36-48 hours after fertilisaion
DIAGNOSING PREGNANCY
describe serum hCG monitoring
- detectable in 98% of patients after day 11
- at 4 weeks the hCG double every 2 days, levels peak at 10-12 weeks, then falls and then rises again from 22 weeks
- low false positive rates
DIAGNOSING PREGNANCY
describe ultrasonography
- earliest structure identified is gestational sac at 4-5 weeks
- yolk sace – 4-5 weeks and seen until 10 weeks gestation (larger thn 7mm with no fetal pole suggests nonviable pregnancy
- embryonic pole – 5-6 weeks
- 5-6 weeks – HR=100-115 which rises to 140 by 9 weeks gestational age
DIAGNOSING PREGNANCIES
multiple pregnancies
- hcg levels higher
- uterus larger thn expected for dates
- more morning sickness
- greater appetite
- too much weight gain
- foeta moveements in different parts of abdomen at same time
- alpha-fetoprotein levels higher
- ultrasound
BLEEDING IN PREGNANCY
benign causes
Infection -cervix, vagina, STI
Cervical changes – progesterone influence, sexual intercourse
Implantation bleed
BLEEDING IN PREGNANCY
serious causes
Miscarriage
Ectopic pregnancy
Gestational trophoblastic diseases
what is miscarriage?
Spontaneous loss of the pregnancy before fetus reaches viability
Up to 20% of all clinically recognised pregnancies (80% 1st trimester)
UK viability – 23+6 weeks
MISCARRIAGE
classification
Threatened
Inevitable
Complete/incomplete
Missed miscarriage – anembryonic pregnancy
missed miscarriage
Failure of an embryo or fetur to develop in pregnancy
Death of fetus in utero – no cardiac activity
Gestational sac continue to grow, no fetal parts seen
Diagnosis with USS
aetiology of miscarriage
foetal chromosomal abnormalities hormonal factors immunological causes uterine anomalies infections environmental factors unexplained
AETIOLOGY OF MISCARRIAGE
examples of foetal chromosomal abnormalities
- trisomy 21-downs
- trisomy 13 – patau
- trisomy 18 - edwards
AETIOLOGY OF MISCARRIAGE
examples of hormonal factors
- PCOS
- Inadequate luteal function
- Diabetes
- Thyroid dysfunction
AETIOLOGY OF MISCARRIAGE
immunological causes
- Autoimmune
* alloimmune
AETIOLOGY OF MISCARRIAGE
uterine anomalies
- septated
- asherman syndrome
- fibroid
AETIOLOGY OF MISCARRIAGE
environmental factors
- alcohol
* smoking
CONSERVATIVE MANAGEMENT OF MISCARRIAGE
confirmed incomplete, missed or inevitable miscarriage?
- first line expectant management 7-14 days if accepted by women
- exclude complicated factors
- reassess after 14 days if no bleeding
CONSERVATIVE MANAGEMENT OF MISCARRIAGE
complete miscarriage
- pregnancy test at home in 3 weeks and return for assessment if positive
- anti-d if required
CONSERVATIVE MANAGEMENT OF MISCARRIAGE
when can retained products of conception by managed conservatively
if small and minimal bleeding
MEDICAL MANAGEMENT OF MISCARRIAGE
Misoprostol – synthetic prostaglandin E1 (PGE1) – orally or vaginally usually with antiprogesterone priming (mifepristone) 24-28hr prior
Bleeding may continue for up to 3 weeks after medical uterine evacuation but completion rates upto 80-90% expected after 9 weeks
Warn women that passage of pregnancy tissue may be associated with pain and heavy bleeding and 24hr telephone advice and facilities for emergency admission should be available
SURGICAL MANAGEMENT OF MISCARRIAGE
Evaluation of retained products of conception
General anaesthesia/sedation, Theatre, Suction evacuation
Local anaesthesia / outpatient department/manual vacuum aspiration
Complications – infection, haemorrhage, uterine performation, retained products of conception, intrauterine adhesions, cervical tears, intra-abdominal trauma, uterine and cervical trauma can be minimised by administering prostaglandin before the procedure