A pregnancy that ends before the 28th week is not considered a birth but is medically called a "miscarriage". Pregnancies that end between the 28th and 38th week are considered premature births. The normal duration of a pregnancy is considered to last between 38 and 42 weeks. If a pregnancy lasts for more than 42 weeks, it is considered an "over-kept pregnancy". Six months is less than 28 weeks so it seems that you probably had a miscarriage. There could be many reasons for miscarriage:
1. Genetic malformations of the fetus;
2. Fetal damage caused by viral infections, Toxoplasmosis, drugs, irradiationâ¦;
3. Vaginal infection;
4. Trauma;
5. Cervical failure;
6. Uterusâs tumors etc.
You can consult your gynecologist to find out the precise cause for the miscarriage in your case.