Dr. Nayna Patel (R), a pioneer of reproductive surrogacy in India, conducts an ultrasound on 30 year old surrogate mother – Rinku Macwan, bearing twin babies, at Kaival Hospital in Anand, some 90 kms from Ahmedabad, on October 31, 2011. Commercial surrogacy, made legal in India in 2002 and popular among foreign couples who are unable to conceive, has provided a large source of income for some Indian women acting as surrogate mothers despite local stigmas and ethical debates. The United Nations says that by its best estimates the seven billionth baby will be born somewhere on October 31, and countries around the world have planned events surrounding the demographic milestone. AFP PHOTO/SAM PANTHAKY (Photo credit should read SAM PANTHAKY/AFP/Getty Images)