What is the weight of a embryo?

The weight of an embryo varies significantly depending on its stage of development. In the early stages, such as at 4 weeks, an embryo may weigh just about 1 gram. By the end of the first trimester, around 12 weeks, it can weigh approximately 14 grams. The weight continues to increase as the pregnancy progresses, with the average weight of a full-term baby being around 3,000 to 4,000 grams (6 to 8.8 pounds).