For IVF Embryos, Lab Chemicals Can Have Lasting Effects

August 25, 2016

(STAT News) – The different types of goop that embryos are grown in during in vitro fertilization could play a part in how well the process works — and how babies conceived through IVF fare after birth, too. A new study — the first to randomly assign embryos to culture media — finds that the substrate used could affect the number of viable embryos created, pregnancy rates, and birth weight. There are around 20 different substrates used in clinics around the world. Fertility experts now say they want companies who make those compounds to clearly label the ingredients so scientists can parse out the differences.