TY  - GEN
AU  - SIEVE,B F
TI  - A new antifertility factor; (a preliminary report)
SN  - 0036-8075
PY  - 2003///0501
KW  - Contraceptive Agents
KW  - Humans
N1  - Publication Type: Journal Article
UR  - https://doi.org/10.1126/science.116.3015.373
ER  -