TY  - RPRT
TI  - Progestogen-only pills and bleeding disturbances.
AU  - G Kovacs
PY  - 1996
DO  - 10.1093/humrep/11.suppl_2.20
UR  - https://pubmed.ncbi.nlm.nih.gov/8982741/
ID  - 8982741
ER  -