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. 2021 Apr 30;38(9):2227–2235. doi: 10.1007/s10815-021-02206-0

Fig. 1.

Fig. 1

The first-month procedure of ART. COH, controlled ovarian hyperstimulation; ET, embryo transfer; GnRH, gonadotropin-releasing hormone; OI, ovulation induction (the end of COH); OR, oocyte retrieval; and PT, pregnancy tests. Subgroup “Hypothyroid” was defined as with a certified diagnosis of clinical or subclinical hypothyroidism