TY  - RPRT
TI  - Why might infertile couples have problem pregnancies?
AU  - D D Baird
AU  - A J Wilcox
AU  - M S Kramer
PY  - 1999
DO  - 10.1016/s0140-6736(99)90050-8
UR  - https://pubmed.ncbi.nlm.nih.gov/10347979/
ID  - 10347979
ER  -