共 6 条
[1]
BINSTOCK MA, 1995, J REPROD MED, V40, P507
[2]
Effect of frequency of prenatal care visits on perinatal outcome among low-risk women - A randomized controlled trial
[J].
JAMA-JOURNAL OF THE AMERICAN MEDICAL ASSOCIATION,
1996, 275 (11)
:847-851
[5]
VILLAR J, 1998, PREGNANCY CHILDBIRTH
[6]
Walker DS, 1997, J NURSE-MIDWIFERY, V42, P295