The Standard Days Method of fertility awareness-based contraception provides acceptable efficacy only for women whose menstrual cycles fall within which range?
- A 21 to 25 days
- B 33 to 40 days
- C 26 to 32 days ✓
- D Any cycle length if mucus signs are tracked
Correct answer: C. 26 to 32 days
Explanation
The Standard Days Method assumes a cycle of 26 to 32 days and defines a fixed fertile window of days 8 through 19, during which couples avoid unprotected intercourse; CycleBeads help track this. Women with cycles shorter than 26 or longer than 32 days have fertile windows that shift outside this fixed range, so the method fails and they should use the cervical mucus or symptothermal method instead.
Reference: WHO Family Planning: A Global Handbook for Providers, 2018 update ed.
High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP
Written and medically reviewed by the StethoPrep medical team.