- Study involved 902 women with regular menstrual cycles.
- NC group achieved 54.0% live birth rate; HRT group 43.0%.
- NC preparation linked with lower miscarriage and antepartum hemorrhage rates.
- Participants switched protocols due to ovulation-related issues.
- Natural cycles reflect physiological hormonal conditions, reducing synthetic hormone risks.
- Further research needed for outcomes in older or anovulatory populations.
Source: PLOS