Mc in 1st trim,may b because of mismatch chromosome or chromosomal abnormality,means chances of next child 2 b born with chromosomal defects r more?

Not on the internet: That specific question cannot possibly be answered on the internet. You need a geneticist to do the right tests and provide you with a competent consolation or evaluation.

Miscarriage: Most first trimester miscarriages are chromosomally abnormal. Women who miscarry repetitively need evaluation. Parents who carry a chromosomal rearrangement may have a child with a chromosome abnormality. Whether a woman is at increased risk for a child with a chromosomal abnormality depends upon her age, which parent carries the abnormality and what abnormality is carried. Ask your doctor.