USMLE Step 2 CK Lecture Notes 2019: Obstetrics/Gynecology (Kaplan Test Prep)

OB TRIAD Post-Conception Week 2 Postconception week 2: most significant event is the development of the bilamina ...

OB TRIAD Post-Conception Week 3 Another significant event is the invasion of the maternal sinusoids by the sync ...

OB TRIAD Post-Conception Week 4-8 Three germ layers differentiating Greatest risk of malformations Folic acid ...

PARAMESONEPHRIC (MÜLLERIAN) DUCT This duct is present in all early embryos and is the primordium of the female inte ...

FEMALE EXTERNAL GENITALIA No hormonal stimulation is needed for differentiation of the external genitalia into ...

MESONEPHRIC (WOLFFIAN) DUCT This duct is also present in all early embryos and is the primordium of the male in ...

MALE EXTERNAL GENITALIA Dihydrotestosterone (DHT) stimulation is needed for differentiation of the external genita ...

Table I-1-5. Embryology Gonadal Ductal External Genitalia Germ cells Coelomic epithelium Mesenchyme Mesonephros Oogonia Gr ...

TERATOLOGY A 36-year-old woman undergoes a barium enema for rectal bleeding on February 1, with estimated ...

herpes virus), spirochetes (e.g., syphilis), and protozoa (e.g., toxoplasmosis). Ionizing radiation: No single diagnost ...

FDA PREGNANCY RISK CATEGORIES Prior to 2015 After 2015 Category A: adequate and well-controlled studies have fa ...

The A, B, C, D, and X risk categories in use since 1979 have now been replaced with narrative section ...

SPECIFIC SYNDROMES Alcohol: fetal alcohol syndrome—IUGR, midfacial hypoplasia, developmental delay, short palpeb ...

PERINATAL STATISTICS AND TERMINOLOGY Table I-1-6. Terminology for Perinatal Statistics Terminology Definition Gravidity To ...

Table I-1-7. Terminology for Perinatal Losses Perinatal death Fetal/neonatal death from 20 menstrual weeks t ...

Figure I-1-4. Perinatal Mortality Terminology ...

GENETIC DISORDERS HUMAN GENETICS IN PREGNANCY A 37-year-old G5 P0 Ab4 comes for prenatal care at 7 weeks ...

CHROMOSOMAL ABERRATIONS Aneuploidy refers to numeric chromosome abnormalities in which cells contain other than 2 ...

NOTE Trisomy: extra single, 47,XX+21 Monosomy: missing single, 45,X Polyploidy: extra set, 69,XXY ...

TRANSLOCATIONS Reciprocal translocation involves any 2 or more nonhomologous chromosomes and occurs when there ...