Please insert maximum age of 50. This extra genetic material causes the developmental changes and physical features of Down syndrome.Down syndrome varies in severity among individuals, causing lifelong intellectual disability and developmental delays. First-trimester or second-trimester screening, or both, for Down’s syndrome. Enter your age below. Cuckle HS, Wald NJ, Thompson SG. The incidence of fetal trisomies is directly related to maternal age. 2005;353:2001-2011. For example, a risk of Down syndrome of one in 100 means that if 100 women have this risk, we expect that one of these women will have a baby with Down syndrome and that 99 will not. (1987) Estimating a woman’s risk of having a pregnancy associated with Down’s syndrome using her age and serum alpha-fetoprotein level. Age-adjusted risk assessment for fetal Down’s syndrome during the second trimester: Description of the method and analysis of 142 cases. Ultrasound Obstet Gynecol. Because of the spontaneous miscarriages of pregnancies with Down syndrome between … Compared to children without Down syndrome, children with Down syndrome are at higher risk for: Hearing loss (up to 75% may be affected) Obstructive sleep apnea, a condition where a person’s breathing temporarily stops while asleep (between 50 -75%) Ear infections (between 50 -70% may be affected) Eye diseases, like cataracts (up to 60%) It's the most common genetic chromosomal disorder and cause of learning disa… These include: Advanced maternal age (a woman over the age of 35) Advanced paternal age (a man over the age of 40) A previous pregnancy with a down syndrome foetus (carried full term or miscarried). N Eng J Med. Cuckle H. (1999) Down syndrome fetal loss rate in early pregnancy. This is the same as saying that the baby has a 1 percent chance of having Down syndrome and a … Br J Obstet Gynaecol 94,387-402. 1998;12:8-14. Please insert a number. NIFTY® is a non-invasive prenatal test that screens for genetic conditions such as Down Syndrome with 99,5% accuracy form week 10 of pregnancy. Nyberg DA, Luthy DA, Resta RG, et al. Please insert minimum age of 16. The risk of having a term pregnancy with Down's syndrome increases with maternal age as shown in the table below. Maternal Age Risk Calculator Back to all apps. It is known as the maternal age-specific risk and is the background risk of Down's syndrome used when interpreting a screening result. Down syndrome is a genetic disorder caused when abnormal cell division results in an extra full or partial copy of chromosome 21. Prenat Diagn 19,1177-1179.