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目的:提高对四胎妊娠的认识和诊治水平。方法:对1例自然怀孕的四胎妊娠进行分析,并复习国内外相关文献。结果:四胎妊娠的发生率极低,围......
Blastocyst transfer is advocated to reduce the risk of multiple gestations in pregnancies by assisted reproduction. Neve......