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The Life of an Egg – 2 of 3

The Second and Third Days

Continued from The First Day

About 24 hours after insertion of sperm, the zygote begins to divide.  Now it is called a pre-embryo.  Technically it will be a pre-embryo for several days—until well past the time of implantation—but we tend to just call them embryos even though the term is not correct. The one cell divides into two, then the two cells each split into two, so the pre-embryo may have 3 or 4 cells, depending on the timing of each cell’s division.  Two days after egg retrieval we expect the embryos to be at the 2-4 cell stage.  Sometimes, if we are putting back all the embryos that we have, we will transfer embryos on Day 2.

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Laurel Fertility Care features a nationally accredited state-of-the-art laboratory allowing us to provide some of the latest assisted reproductive techniques, including; IVF, ICSI, IUI, egg preservation, egg donation, and IVF surrogacy. Laurel Fertility Care has three convenient locations in the Bay Area: In San Francisco, serving Berkley, Oakland, San Mateo, Palo Alto and San Jose. In Modesto, serving Fresno, Tracy, Stockton, Livermore, Manteca and Sacramento.