11.   That method allowed investigators to successfully freeze human embryos.

12.   The investigators froze the embryos and shipped them to Texas to be implanted into cows.

13.   The most successful route to pregnancy is to freeze embryos before starting chemotherapy, since they survive the thaw much better than eggs.

14.   Then they froze the embryos.

15.   They indicate at the time the embryos are frozen what would be done with them in the event they are no longer needed for the couple.

16.   Pharming said the cloning of its calves remained significant because the embryos were frozen before and after the cloning to allow more time flexibility in their experiment.

17.   Parming said the cloning of its calves remained significant because the embryos were frozen before and after the cloning to allow more time flexibility in their experiment.

18.   The embryo will be frozen in liquid nitrogen until a suitable panda host is found.

19.   The regulation forbids the storage of human embryos for more than five years without permission from the donor couple to freeze the embryos for up to another five years.

20.   Although embryos are routinely frozen in fertility clinics, this is generally done within a week of conception, before cell specialization begins.