Until what month can a pregnant woman travel on Vietnam Airlines?

Vietnam Airlines does not accept Expectant mothers within 7 days before and after her confinement and the infants under the age of 14 days for travel.

Expectant mother is required to inform herself about her pregnancy at booking office(the time of pregnancy, expected date of confinement, any trouble may occur...)

Expectant mothers are required to have medical certification in the following cases:

The pregnancy is about 32 weeks and above; or

Can not identify the time of pregnancy or the expected date of confinement; or

Given twin or triplets at previous confinement; or

Any danger may occur during confinement

Artifical insemination