来曲唑联合二甲双胍对氯米芬抵抗的PCOS促排卵疗效观察
래곡서연합이갑쌍고대록미분저항적PCOS촉배란료효관찰
Efficacy of letrozole plus metformi on promoting ovulation in clomiphene citrate-resistant patients with poly cystic ovary syndrome
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