High-impact aerobics, such as running, jumping, or intense cardio sessions, can put undue strain on the uterus and the supporting muscles and ligaments. Research from the Journal of Maternal-Fetal & Neonatal Medicine indicates that women who engaged in high-impact exercises had a higher likelihood of experiencing uterine contractions, which can lead to miscarriage, especially in the first trimester. Go for low-impact alternatives like swimming or prenatal yoga to stay fit without compromising safety