1. Relationship between maternal age and aneuploidy in in vitro fertilization pregnancy loss 
Steven D Spandorfer, M.D., Owen K Davis, M.D., Larry I Barmat, M.D., Pak H Chung, M.D., Zev Rosenwaks, M.D. 
Fertility and Sterility 
Volume 81, Issue 5, Pages (May 2004)
DOI: /j.fertnstert

2. FIGURE 1
Miscarriages increase with maternal age. Patients with multiple pregnancies had a lower overall miscarriage rate for each age group.
Spandorfer. Miscarriage rates and maternal age. Fertil Steril 2004.
Fertility and Sterility  , DOI: ( /j.fertnstert )

3. FIGURE 2
Overall fetal heart loss rate increased significantly in women aged >35 years.
Spandorfer. Miscarriage rates and maternal age. Fertil Steril 2004.
Fertility and Sterility  , DOI: ( /j.fertnstert )