Record details
Subjects: *CHI-squared test; *CONFERENCES & conventions; *MATERNAL health servicesUNITED States; SINGAPOREFACEBOOK (Web resource)
Subjects: *INFANT mortality; *COMPARATIVE studies; *CONFIDENCE intervalsUNITED States
Subjects: *INFERTILITY treatment; *LOW birth weight; *EMBRYO transferPUERTO Rico; WASHINGTON (D.C.); UNITED StatesCENTERS for Disease Control & Prevention (U.S.)
Subjects: *WEIGHT gain; *FETOFETAL transfusion; *BODY mass indexUNITED States
Subjects: *FETOFETAL transfusion; *PERINATAL death; *COMPARATIVE studiesUNITED States; UNITED Kingdom; SPAIN
Subjects: *MUSCLE tumors; *FERTILITY; *PREMATURE infantsUNITED States
Subjects: ANIMAL infertility; PREGNANCY in animals; REPRODUCTIVE technologyUNITED States
Subjects: PREGNANCY complications; RISK factors in premature labor; MATERNAL ageUNITED States
Subjects: BIRTH certificates; BIRTH weight; LOW birth weightNEW York (State); UNITED States