The first signs of pregnancy are not similar to menstruation and can be differentiated by menopause and other early pregnancy reactions.
For women who are pregnant, the first sign is usually menopause. Especially for women of childbearing age, if menstruation is delayed after unprotected sex, pregnancy is highly suspected and can be confirmed by urine pregnancy test or blood test.
Some women who are pregnant may experience obvious early pregnancy reactions, which are mainly caused by increased hormone levels in the body, causing dizziness and fatigue, loss of appetite, nausea and vomiting, aversion to oil and grease, a liking for acid, and gastrointestinal flatulence.
Overall, the first signs of pregnancy are not similar to menstruation, and women are advised to go through further examination to ascertain whether they are pregnant or not, rather than making a diagnosis through clinical symptoms.