How Big is the Baby at 3 Weeks Pregnant?
At 3 weeks pregnant, your baby is too small to detect with the naked eye, even though he is growing remarkable fast. By about this week, your baby consists of a ball of cells that can fit into the head of a needle. As you continue to monitor your pregnancy week by week, you will find your baby resembles a blob more than a baby, but this will change rapidly in the weeks to come. Many people wonder at pregnancy week 3 what their chances might be for having twins. Twins generally occur when more than one egg is released from your ovary or ovaries. Your eggs can be fertilized by two separate sperm, which would result in fraternal or dizygotic twins. Identical twins develop when one egg is fertilized but later divides into two. When twins are identical they have the same chromosomal makeup, so they have to be the same gender and have the same physical characteristics. Different twin combinations are possible when you have triplets and quadruplets. For example, if three or more eggs are fert
