1.   After a few days, when the cells have divided several times, the embryo is frozen in liquid nitrogen tanks to be preserved for later implantation.

2.   But each pregnancy failed, and four other embryos were frozen for future attempts.

3.   Embryos are frozen and transferred without additional charges.

4.   Freezing dog embryos to circumvent the synchronizing problem is not an option at this time, according to Long.

5.   He maintains that his former wife agreed when they underwent in vitro fertilization that any unused embryos would be frozen for donation to other childless couples.

6.   If he froze some embryos, she might have another chance for a pregnancy.

7.   Leftover embryos are usually frozen.

8.   My lifetime goal has always been to have six babies, so I decided to freeze my embryos.

9.   On a wider scale, Taconic Farms will act as a sort of storage center for such mutant mice, freezing embryos for distribution to scientists across the country.

10.   Pool said that until recently, he and others froze many embryos that were of poor quality and would never grow.