Which of the following is the most common cause of 1st-trimester abortions :: (A) Chromosomal deletions, (B) Aneuploidy, (C) Chromosomal translocation, (D) Tetraploidy
Answer is B. Ans- B Aneuploidy Overall most common cause- Aneuploidy Most common cause among Aneuploidy types- Trisomy If both Trisomy and Aneuploidy are mentioned - Aneuploidy is the best answer since Trisomy is a type of Aneuploidy.