My wife is exploring freezing her eggs to delay the second baby for career reasons. Any tips?

What your wife is looking for is actually called Social Egg Freezing which is currently illegal in Singapore and are allowed for women who might lose their fertility through medical treatments such as chemotherapy. Although, there will be a review as many women in Singapore are open to the idea of delaying pregnancy. http://sg.theasianparent.com/social-egg-freezing-in-singapore-human-egg-banks/2/