Embryo Development

PFC Team's picture
March 11, 2016

San Francisco, CA – March 11, 2016 – Today at 6:00 pm at the 2016 Annual Meeting of the Pacific Coast Reproductive Society (PCRS) in Rancho Mirage, CA, Pacific Fertility Center (PFC) staff will present their research findings on pregnancy from embryos that have been cultured to Day 7 (D7).

One of the first to focus on the number of chromosome sets (ploidy) and implantation rate of D7 embryos, the study provides the largest data set available on pregnancy outcomes after transfer of D7 blastocysts (embryos at an early stage of development). This is PFC’s second paper on D7 embryos—and one of only a few in the literature, said senior author, Philip Chenette, MD.

Reviewing embryology records from March 2014 to July 2015, PFC researchers looked only at blastocysts on Day 5, 6, or 7.  Of the 5,103 embryos frozen at the blastocyst stage, 816 (16 percent of the total) were frozen on D7 and 53 of these were later transferred to attempt pregnancy.