Table 2.
Study key features
| Study | Year of publication | Design | N of patients | Progesterone | Progesterone daily dosage (mg) | Multicentric | Follow-up (months) | ||
|---|---|---|---|---|---|---|---|---|---|
| Overall | Progestin | GnRH agonist | |||||||
| Zhu et al. | 2017 | Retrospective cohort study | 546 | 293 | 253 | Micronized progesterone | 200 | No | 12 |
| Zhang et al. | 2017 | Retrospective cohort study | 3589 | 1931 | 1658 | MPA | 10 | No | 30 |
| Wang et al. | 2018 | Retrospective cohort study | 1589 | 855 | 734 | Micronized progesterone | 100 | No | 32 |
| Huang et al. | 2019 | Retrospective cohort study | 3556 | 1429 | 2127 | DYG | 20 | No | 48 |
DYG, dydrogesterone; MPA, medroxyprogesterone.