Elephants take 22 months, while mice and hamsters do it in 20 days.
women should ideally give birth to their babies no later than the 42nd week, or
they may be at risk for complications.
This was shown by researchers at
Beersheba’s Soroka University Medical Center who have just published their work
in the Journal of Maternal-Fetal and Neonatal Medicine.
A team from the
hospital’s obstetrics and gynecology branch headed by Dr. Avi Harlev and
Prof. Eyall Sheiner presented their findings recently at an international
obstetrics and gynecology conference in Paris.
Human gestation usually
comes to an end with labor and delivery at the 40th week. But a normal birth can
also take place between the 37th and 42nd weeks, the Soroka researchers said. If
it takes longer, the obstetrician has to decide to intervene rather than let
nature take its course. Women are not always pleased with their doctors’
decisions because they want things to proceed naturally.
looked at women who gave birth between 37 and 40 weeks (term at 40); 40 and 42
weeks; and after 42 weeks. The meta-analysis examined the records of over
202,000 deliveries, of which nearly 10,000 were deliveries beyond
Analyzing all the factors, they concluded that risk of
complications such as stillbirth were significant – 1.5 times the norm – after
42 weeks’ gestation.
Sheiner said the findings stress the importance of
inducing labor if the baby has already reached term.
“There is no doubt
that a careful follow- up and inducing birth can minimize critical complications
such as stillbirth,” he said.