Reproductive Flashcards
(83 cards)
When are fetuses most susceptible to the effects of a teratogen?
3rd-8th week of pregnancy (embryonic period of organogenesis)
Teratogen Medication List (12)
- ACEi (and ARBs)
- Alkylating agents
- Aminoglycosides
- Antiepileptic drugs (commonly valproate, carbamazepine, phenytoin, phenobarbital)
- Diethylstillbestrol (DES)
- Folate antagonists (trimethoprim/ methotrexate, anti epileptic drugs)
- Isotretinoin
- Lithium
- Methimazole
- Tetracyclines
- Thalidomide
- Warfarin
Substance abuse teratogen (3)
- Alcohol
- Cocaine
- Smoking (nicotine, CO)
Miscellaneous teratogens (5)
- Iodine (lack or excess)
- Maternal diabetes
- Methylmercury
- Vitamin A excess
- Xrays
Teratogen effect: ACE inhibitors (and ARBs)
Renal damage
Teratogen effect: Alkylating agents (2)
- absence of digits
2. multiple anomalies
Teratogen effect:
Aminoglycosides(1)
Ototoxicity
Teratogen effect:
Antiepileptic drugs(4)
Names (4)
recommended supplementation?
Valproate, Carbamazepine,
Phenytoin, Phenobarbital
- Neural tube defects (high dose folate supplementation)
- Cardiac defects
- cleft palate
- skeletal abnormalities (phalanx/nail hypoplasia, facial dysmorphism)
Teratogen effect:
Diethylstillbestrol (DES) (2)
- Vaginal clear cell adenocarcinoma
2. Congenital Mullerian anomalies
Teratogen effect:
Folate antagonists (1)
Name 3 examples
Neural tube defects
- Trimethoprim
- Methotrexate
- Anti-epileptic drugs
Teratogen effect:
Isotretrinoin (1)
Recommendation
“isoTERATinoin”
Multiple severe birth defects
CONTRACEPTION MANDATORY
Teratogen effect:
Lithium(1)
Ebstein anomaly
apical displacement of tricuspid valve–>enlarged atrium
Teratogen effect:
Methimazole
aplasia cutis congenita
Teratogen effect:
Tetracycline(2)
- discolored teeth
2. inhib bone growth
Teratogen effect:
Thalidomide
“LIMB defects with ‘tha-limb-domide’”
- Limb defects (phocomelia, micromelia=flipper limbs)
Teratogen effect:
Warfarin(4)
- bone deformities
- Fetal hemorrhage
- abortion
- ophthalmologic abnormalities
” Do not wage WARFARe on the baby, keep it HEPpy with HEPARIN(doesn’t cross placenta)
Teratogen effect:
Alcohol
Fetal Alcohol syndrome #1 common cause of birth defects and intellectual disability
Teratogen effect:
Cocaine (4)
how?
- low birth weight
- preterm birth
- IUGR
- Placental abruption
cocaine–>vasoconstriction
Teratogen effect:
Smoking (5)
how?
- low birth weight (leading cause in developed countries)
- preterm labor
- placental problems
- IUGR
- SIDS
Nicotine–>Vasoconstriction
CO–> impaired O2 delivery
Teratogen effect:
Iodine (lack or excess) (2)
- congenital goiter
2. hypothyroidism (cretinism)
Teratogen effect: Maternal diabetes (4)
- Caudal regression syndrome(anal atresia - sirenomelia)
- Congenital Heart defects
- Neural tube defects
- macrosomia
Teratogen effect:
Methylmercury
Source (4)
- Neurotox
- swordfish
- shark
- tilefish
- king mackerel
Teratogen effect:
Vitamin A excess
EXTREMELY HIGH RISK
- spontaneous abortions
- birth defects (cleft palate, cardiac)
Teratogen effect:
X-rays
minimized by?
- microcephaly
- intellectual disability
-minimized by lead shielding