High-risk pregnancy

Catherine Y; Lockwood, Charles J., editors. Queenan's management of high-risk pregnancy : an evidence-based approach 6th. Chichester, West Sussex: Wiley-Blackwell

AL; Ray, JG; High Risk of Pre-eclampsia Identification, Group. Clinical risk factors for pre-eclampsia determined in early pregnancy: systematic review

; Persson, B.; Rogers, M. S.; Sacks, D. A. Hyperglycemia and Adverse Pregnancy Outcomes. New England Journal of Medicine. 2008, 358 (19): 1991–2002.

流產（miscarriage），又稱自然流產（spontaneous abortion 或 pregnancy loss），俗稱小產。是指胚胎或胎兒發育到可在子宮外獨立生存（英语：Fetal viability）之前的自然死亡。有些以孕齡20週為界，之前的胎兒死亡稱為流產，之後的則稱為死產。流產最

Siblings' Risk for Early Pregnancy. Applied Developmental Science. 1998, 2 (2): 62–74. doi:10.1207/s1532480xads0202_1.  Teenage pregnancy is 'contagious'