December 7, 2022

Frozen embryo transfer leads to larger and heavier babies

IVF babies born using frozen embryo transfer are more likely to be larger and heavier, research has shown.
IVF babies born using frozen
embryo transfer are more likely to be larger and heavier, research has shown.
Compared with “fresh embryos”, children born from frozen embryos are 1.6 times
more likely to be oversized. French scientists examined babies born from frozen
embryos and compared them with the “fresh” cohort of babies, in terms of mode
of delivery, rate of premature birth, average child measurements, low birth
weight and rates of perinatal mortality.

The
researchers found that the average weight, height and head circumference of the
cryo-babies were higher than those of the fresh babies. Of frozen embryo
babies, 9.2% were “small-for-gestational-age”, compared to 14.8% of fresh IVF
babies and 11.3% of naturally conceived babies.

“Frozen
embryo transfer did not seem to adversely affect neonatal outcome,” says Dr.
Sylvie Epelboin, from Bichat-Claude Bernard Hospital in Paris. “We are not sure
why the cryo babies are heavier and larger, but we think it may have something
to do with the hormonal hyperstimulation during the fresh cycles.”

Babies
with high birth weight may face an increased rate of delivery by Caesarean
section and obstetric intervention, which can both cause complications for both
baby and mother. They can also cause significant complications in the birth,
such as tearing and blood loss. ~ Science Daily, Jul 5

Frozen embryo transfer leads to larger and heavier babies
Jared Yee
frozen embryos
IVF