What is the method of reducing birth weight in early pregnancy?

The method of reducing the fetus in the first trimester is as follows: emptying the bladder during the operation, disinfecting the vulva and vagina, rinsing it with normal saline and drying it. After selecting the target embryo for debulking, use a 16G puncture needle for oocyte retrieval to insert the needle from the curvature of the vagina, then connect a syringe with 10% potassium chloride, slowly inject it, and pierce the embryo through the uterine wall along the puncture line. At the pulsation of the heart tube, small, one or repeated aspirations are performed until all or most of the embryonic tissue is aspirated, and the amniotic fluid is not aspirated as much as possible. After confirming that the embryo is completely aspirated or the remaining embryo has no fetal heartbeat, withdraw the needle.

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