Embryo transfer

After fertilizationFusion of an egg and a spermatozoon, fertilization occurs naturally in the fallopian tubes., zygotes are cultured for a period of approximately 24 hours. During this time, the chromosomes of maternal and paternal nuclei are duplicated, then they gather together before the first cell division.

The transfer of the embryos into the uterine cavity is performed 48-72 hours after egg retrieval. This painless medical procedure is performed vaginally using a thin catheterSmall tube that can be inserted into organs.. It may also be performed under ultrasound guidance.

Sometimes it is necessary to grasp the cervixLower part of the uterus, adjacent to and reaching into the vagina, which secretes an alkaline mucus to protect the sperm from acidic environment of the vagina. with forceps in order to position the uterusPear-shaped organ that contains and nourishes the fetus during pregnancy, which contracts in a powerful and rhythmic manner at birth to expel the fetus. and allow the insertion of the catheterSmall tube that can be inserted into organs..

ProgesteroneFemale sex hormone secreted by the corpus luteum after ovulation. Its task is to prepare the uterine lining (endometrium) for the implantation of the embryo. If  pregnancy occurs, the placenta is then responsible for the further production of progesterone., administered vaginally, is prescribed after a fresh embryoTerm designating the early stages of development from conception to the eighth week of pregnancy. From the first cell division on, the two-cell stage, one uses the term embryo. transfer. The transfer of embryos obtained from cryopreserved zygotes is generally made in a natural cycle. In this case, progesteroneFemale sex hormone secreted by the corpus luteum after ovulation. Its task is to prepare the uterine lining (endometrium) for the implantation of the embryo. If  pregnancy occurs, the placenta is then responsible for the further production of progesterone. is not necessary.

Two embryos are usually transferred.