TY  - RPRT
TI  - Effect of repeated semen ejaculation on sperm quality.
AU  - S N Nnatu
AU  - O F Giwa-Osagie
AU  - E E Essien
PY  - 1991
UR  - https://pubmed.ncbi.nlm.nih.gov/2054949/
ID  - 2054949
ER  -