The clinician managing reproductive and maternal health must integrate advanced pathophysiology with pharmacological management of pregnancy complications and gynecological conditions. Preeclampsia involves inadequate spiral artery remodeling by invasive cytotrophoblasts, resulting in placental hypoperfusion and release of anti-angiogenic factors (soluble fms-like tyrosine kinase-1, soluble endoglin) that cause widespread endothelial dysfunction — the definitive treatment is delivery, with magnesium sulfate for seizure prophylaxis and antihypertensives (labetalol, nifedipine, hydralazine) for severe-range blood pressures. Gestational diabetes results from placental hormones (human placental lactogen, cortisol, progesterone) creating insulin resistance that exceeds pancreatic beta-cell compensatory capacity — management progresses from medical nutrition therapy to insulin (preferred) or metformin/glyburide. Hormonal contraception pharmacology involves estrogen-progestin combinations suppressing the HPO axis (inhibiting LH surge and ovulation), thickening cervical mucus, and thinning the endometrium, with prescribing considerations including VTE risk stratification using the CDC Medical Eligibility Criteria.