At what age in weeks are the limbs well formed?

The limb buds appears in the in the fourth week of gestation and the upper limb is visible on day 24. Initial elongation of the bud forms around 33 days and continues to elongate until seven weeks.

The development of limbs in a Human fetus starts around week 7 and goes on till Week 10 by which time the bones in the limbs form and the fingers separate