TY  - GEN
AU  - Fehring,Richard J
AU  - Mu,Qiyan
TI  - Cohort efficacy study of natural family planning among perimenopause age women
SN  - 1552-6909
PY  - 2015///0105
KW  - Adult
KW  - Age Factors
KW  - Cohort Studies
KW  - Female
KW  - Humans
KW  - Middle Aged
KW  - Natural Family Planning Methods
KW  - methods
KW  - Perimenopause
KW  - Pregnancy
KW  - Pregnancy Rate
KW  - Pregnancy, Unplanned
KW  - Prospective Studies
KW  - Sensitivity and Specificity
N1  - Publication Type: Journal Article
UR  - https://doi.org/10.1111/1552-6909.12307
ER  -