TY  - RPRT
TI  - Time to pregnancy--a model and its application.
AU  - J L Boldsen
AU  - I Schaumburg
PY  - 1990
DO  - 10.1017/s0021932000018587
UR  - https://pubmed.ncbi.nlm.nih.gov/2335546/
ID  - 2335546
ER  -