Table 3.
Number of studies evaluated in each comparison and in each subgroup analysis.
| FSH + LH vs. FSH alone | FSH + hCG vs. FSH alone | hMG vs. FSH alone | |
|---|---|---|---|
| Overall analyses | 34 | 9 | 29 |
| Subgroup analyses | |||
| GnRH antagonists | 10 | 3 | 5 |
| GnRH agonists | 22 | 6 | 20 |
| GnRH analogs missing data | 2 | 0 | 4 |
| In vitro fertilization/intracytoplasmatic sperm injection | 33 | 9 | 26 |
| Intrauterine insemination | 1 | 0 | 3 |
| ART schemes missing information | 0 | 0 | 0 |
ART, assisted reproductive technology; FSH, follicle-stimulating hormone; GnRH, gonadotropin-releasing hormone; hCG, human chorionic gonadotropin; LH, luteinizing hormone.