One of the unintended consequences of multiple transfers is the temptation to selectively reduce (fancy word for picking out one of your offspring to abort). Sometimes it is based on the gender of the offspring and sometimes the perceived health and sometimes it is pure location (the one that the abortion instrument reaches first.) The motivation of the couple may be pure in the beginning but the slippery slope into abortion and destruction of the left over embryos is rapid. The more I learn about IVF clinics the more I think they should go away or at least be tightly regulated. I read the book Inconceivable by Sean and Carolyn Savage and by the end of the book, I could understand why the Catholic Church is opposed to IVF.
In Western Europe, where some countries pay for in-vitro fertilization, or IVF, many authorities recommend a single embryo transfer for women under 37 and a maximum of two embryos for women 37 to 40. For women over 40, three is often the limit by law.
The U.K. has tougher policies. Transferring three embryos in women under 40 is banned. And if doctors transfer more than three embryos, they must explain their actions to the fertility regulator. In 2010, about 65 percent of embryo transfers involved two embryos and 4 percent used three. The rest were single embryos.