When do pregnancy signs start to show?

Depends: It depends on what signs you're speaking about. The first sign a woman might be pregnant is that she misses her period. A sign that comes later on is nausea or breast tenderness. Fatigue and increased need for sleep are often following. A missed period happens at around 4 to 5 weeks after the beginning of the last menstrual period. The other symptoms occur 1 to 2 weeks later.