Should I start to drink maternal milk as I am now in week 7? What brand is recommended?

Maternal milk is optional, not a must. Just take the prenatals vitamins given by your gynae. I didn't consume any maternal milk but took the prenatal vitamins given by my gynae, eat healthy, drinks sugar free soy milk or fresh milk, baby is a healthy full term 40 weeks 3.2kg baby at birth. I do not have GD too.