Restricted embryo growth signals miscarriage risk
London: Restricted growth of an embryo during the early stages of pregnancy is linked to its risk of miscarriage, a new study led by Indian-origin scientists has found.
Researchers at the University of Nottingham found that 78 percent of single-baby pregnancies that ended in miscarriage were in the smallest 5 percent of embryos.
They measured the length of more than 500 single and twin embryos during the first trimester.
The Nottingham researchers tracked the growth of 247 singleton and 264 twin embryos conceived through IVF, because this allowed them to know the embryos’ precise gestational age.
For each embryo, the distance from top of the embryo’s head to the bottom of its buttocks, the crown-rump length, was measured once during the first trimester using an ultrasound scan.
The pregnancy was then monitored until birth.
Using the measurements, the researchers discovered that poor growth in the first 12 weeks of pregnancy was a good predictor of miscarriage.
“We also need to look at bloody supply to the embryo and whatever genes are passed on from the father too,” the BBC quoted Raj Mathur, a consultant gynaecologist as saying.
They calculated that 77.8 percent of single embryo pregnancies that miscarried were growth restricted, while 98.1 percent of single embryo pregnancies that did not miscarry were not growth restricted.
The researchers also found that this was not the case in twin pregnancies, however, where only 28.6 percent of pregnancies that miscarried were growth restricted.
Ninety-eight per cent of twin pregnancies that did not miscarry were not growth restricted.
Shyamaly Sur, who led the research, said that the findings should help to identify pregnancies at risk of miscarriage.
“There are various reasons why some embryos show restricted growth in the early stages of pregnancy. It could be down to an abnormality in the foetus or something in the environment of the womb,” Sur said.
“More research is now needed to investigate the relationship between growth and the underlying causes of miscarriage in more detail.
“We are focussing on how blood flow to the womb lining and embryo quality influence conception rates and subsequent miscarriage.
“There is something else going on with twin embryos. We need more research in this area,” he added.
The study was presented at the British Fertility Society annual meeting in Leeds.
More from India
More from World
More from Sports
More from Entertaiment
- Will Akhilesh-Rahul alliance be able to trump BJP in UP elections?
- Arms case: Salman Khan acquitted by Jodhpur court
- Raisina Dialogue 2017: Pakistan must walk away from terror, says PM Modi
- DNA: Analysis of insensitivity shown by political leaders over rising poverty in India
- Are separatists scared with 'Dangal' girl Zaira Wasim's success?
- World's 30 most dynamic cities: Check out the full list
- WATCH: Kieron Pollard's incredible one-handed six demoralises Fawad Ahmed
- China State TV said that its troops can reach New Delhi in 48 hours in war scenario; Indians slay it with their replies
- IND vs ENG, 2nd ODI: Yuvraj Singh silences critics with 14th ODI hundred, fourth against England — WATCH
- Bengaluru pips Silicon Valley to become world's most dynamic city