Concerns in Pregnancy. Alcohol Use in Pregnancy and Lactation / Ruta M Nonacs -- Smoking, Vaping, and Nicotine Exposure / John Byrne, George Saade -- Opioid Use, Misuse, and Addiction in Pregnancy and Postpartum / Mishka Terplan -- Depression / Kimberly Yonkers -- Antenatal Testing. Prenatal Testing for Chromosomal Abnormalities / Mary E Norton -- Fetal Echocardiography / Joshua A Copel -- Clinical Use of Doppler / Henry L Galan -- Antepartum Testing / Michael P Nageotte -- Fetal Blood Sampling and Transfusion / Patricia Santiago-Munoz -- Preconception Genetic Screening / Lauren Sayres, Jeffrey A Kuller -- Maternal Disease. Maternal Anemia / Elaine Duryea -- Hemoglobinopathies in Pregnancy / Bradley Sipe, Judette Louis -- Fetal and Neonatal Alloimmune Thrombocytopenia / Russell Miller, Richard Berkowitz -- Rheumatological Disorders / Lisa R Sammaritano, Bonnie L Bermas -- Antiphospholipid Syndrome / Robert M Silver -- Inherited Thrombophilias / Andra H James, Jerome J Federspiel -- Valvular Heart Disease in Pregnancy / Blake Zwerling, Afshan B Hameed -- Peripartum Cardiomyopathy / Sarah Rae Easter, Carolyn M Zelop -- Thromboembolism / Michael J Paidas -- Renal Disease / Shivani Patel -- Obesity / Patrick S Ramsey -- Diabetes Mellitus / Mark B Landon, Steven G Gabbe -- Thyroid Disorders / Elizabeth O Buschur, Stephen F Thung -- Hepatitis in Pregnancy / Andrew Myers, Asa Oxner, John Sinnott, Christian Brechot -- Asthma / Michael Schatz -- Epilepsy / Thomas McElrath -- Chronic Hypertension / Michal Fishel Bartal, Baha M Sibai -- Cytomegalovirus, Genital Herpes, Rubella, and Toxoplasmosis / Kerry E Drury, Brenna L Hughes -- Syphilis / Emily H Adhikari -- Vector-Borne Diseases in Pregnancy / Karin Nielsen-Saines, Tara Kerin -- Influenza / Amanda C Zofkie, Vanessa Rogers -- Malaria / Blair J Wylie -- Human Immunodeficiency Virus Infection / Emily H Adhikari -- Parvovirus B19 / Kathy C Matthews, Emilie L Vander Haar, Laura E Riley -- Group B Streptococcus / Caitlin A MacGregor, Mara J Dinsmoor -- Biliary, Liver, and Pancreatic Disease / Vic Velanovich, Elizabeth Hoover, Stephanie Ros -- Obstetric Problems. Cervical Insufficiency / Rupsa C Boelig, Vincenzo Berghella -- Nausea and Vomiting / Jared T Roeckner, Haywood L Brown -- Fetal Death and Stillbirth / Alexander M Saucedo, Robert M Silver -- Abnormal Amniotic Fluid Volume / Christina M Ackerman, Thomas R Moore, Heather S Lipkind -- Fetal Growth Restriction / Jodi S Dashe, Anne M Amb©Ưa -- Rh and Other Blood Group Alloimmunizations / Kenneth J Moise -- Preterm Labor / Hyagriv N Simhan -- Prevention of Preterm Birth / Anna King, Sarah JE Stock -- Premature Rupture of the Membranes / Brian M Mercer -- Indicated Late-Preterm and Early-Term Deliveries / Catherine Y Spong -- Chorioamnionitis / Catalin S Buhimschi, Irina A Buhimschi -- Third-Trimester Bleeding / Ilina D Pluym, Christina S Han -- Amniotic Fluid Embolism / Irene A Stafford, Michael A Belfort -- Preeclampsia / Michal Fishel Bartal, Baha M Sibai -- Labor and Delivery. Elective Induction of Labor / Rachel G Sinkey -- Electronic Fetal Heart Rate Monitoring / David A Miller -- Breech Delivery / G Justus Hofmeyr, Mercy-Nkuba Nassali -- Vaginal Birth After Cesarean / James R Scott -- Placenta Accreta Spectrum / Robert M Silver, Deirdre J Lyell -- Shoulder Dystocia / George A Macones, Robert B Gherman -- Twins, Triplets, and Beyond / Mary E D'Alton -- Postpartum Hemorrhage / David B Nelson -- Appendix A: Evaluation of Fetal Health and Defects.