One year after lifting its long-standing two-child limit, Vietnam is offering incentives for people to have more babies as the communist country risks getting old before it gets rich.A new population law and regulations coming into effect on Wednesday extend maternity leave from six to seven months for mothers having a second child as well as offering financial help.If Hanoi residents Nguyen Kim Bich and her husband have a second child, she will get an extra month of maternity leave, free...