Recently, news of famous Chinese actress Xu Jinglei freezing her eggs in the U.S. has become a hot topic online. Her action has sparked a debate over the safety and usefulness of egg freezing. The practice is, however, considered somewhat taboo.

"The only thing I regret is that I am a little bit late in doing so," said Xu Jinglei, the 41-year-old Chinese director and actress, adding that storing the eggs was the only way for her to make up for the potential mistake if she failed to get married and have a baby due to her age-related decline in fertility.

China has no major technological obstacles to successful egg freezing, but so far, according to law, only couples with infertility problems are eligible to apply.

Freezing eggs solely for the purpose of preserving or extending fertility, surrogacy and trading in ova are illegal, according to regulations.

Experts are also warning that postponing pregnancy can lead to a host of problems and are urging potential mothers to think carefully before opting for techniques such as egg freezing.