-First trimester- abnormal fetal development
-Immunologic factors
-Rejection of the embryo through an immune response
-Implantation abnormalities
-Corpus luteum fails to produce enough progesterone to maintain decidua basalis
-Systemic infection
-Rubella (Chicken pox), syphilis, poliomyelitis, cytomegalovirus, and toxoplasmosis infections readily cross the placenta
-Urinary Tract
-Endometrial sloughing due to an infection which slows down the estrogen and progesterone production, this will result to release of...