The fertility regulator, the Human Fertilisation and Embryology Authority, aims to reduce the multiple birth rate.

BBC: Babies boom by a fifth in a decade - ONS

Jane Denton, director of the Multiple Birth Foundation, said for many couples who have struggled to conceive the prospect of twins is very appealing.

BBC: 'One egg' IVF strategy launched

In other reaction, The Federation of Small Businesses said the plan would encourage more women to return to work and boost labour market "flexibility", while the Twins and Multiple Birth Association called it a "step in the right direction".

BBC: Childcare costs scheme 'better for parents'

To mark the day it is hosting Britain's largest gathering of multiple-birth families at Blenheim Palace, in Oxfordshire on Saturday.

BBC: NEWS | Business | Baby credit 'unfair to twins'

Schering AG, which operates under the name of Berlex Laboratories in the U.S., is a big player in birth-control pills, has blockbuster in the multiple sclerosis treatment Betaseron, and is developing some promising cancer drugs.

FORBES: Avaricious In Germany

The drug is not intended for use in women with a multiple pregnancy, such as a twin pregnancy, or other risk factors for preterm birth.

FORBES: New Drug To Prevent Pre-Term Birth Approved