At 42, having a baby is harder than it would have been a decade earlier, but it’s far from impossible. In 2023, more than 147,000 babies were born to women age 40 and older in the United States, a 193% increase from 1990. The odds are lower, the risks are real, and the path often requires more medical support, but tens of thousands of women do it every year.
How Fertility Changes at 42
The core challenge at 42 is egg quantity and quality. Both decline steadily after 35, and the drop accelerates into the early 40s. In populations that don’t use contraception, about 33% of women are infertile by age 40, rising to 87% by 45. For women who can conceive naturally, the monthly odds are significantly lower than in their 20s or early 30s. At ages 27 to 29, the average couple has roughly a 30% chance of conceiving in any given cycle. By the late 30s, that drops to about 15% per cycle, and it continues to fall into the 40s.
A blood test called AMH (anti-Müllerian hormone) gives a rough picture of remaining egg supply. At 40, a typical value on the lower end is around 1.0 ng/mL. By 45, it’s closer to 0.5 ng/mL. These numbers vary widely between individuals, which is one reason some 42-year-olds conceive quickly while others don’t. Your own fertility at 42 depends heavily on your personal ovarian reserve, overall health, and whether you’re trying naturally or using assisted reproduction.
The Real Numbers on Pregnancy Risk
A pregnancy at 42 carries higher risks than one at 32, across several categories. Understanding the specific numbers helps put those risks in perspective.
Miscarriage: The risk of miscarriage climbs steeply with age. It’s lowest around age 27, at about 9.5%. By the early 40s, the rate is roughly two to three times higher, and by 45 and older it reaches 54%. The primary driver is chromosomal abnormalities in the egg, which become more common as eggs age.
Chromosomal conditions: At 42, the chance of a pregnancy with Down syndrome is about 1 in 64. The chance of any chromosomal abnormality is about 1 in 42. For comparison, at age 30 the Down syndrome risk is roughly 1 in 900. These numbers sound alarming, but they also mean that the vast majority of pregnancies at 42 are chromosomally typical.
Preeclampsia and gestational diabetes: Preeclampsia risk rises noticeably after 40. Gestational diabetes risk begins climbing after 25 but continues increasing with age. Both conditions are manageable with proper monitoring, but they do mean a pregnancy at 42 is more likely to require closer medical attention.
Stillbirth: The risk of stillbirth remains low overall but is higher with advancing maternal age. This is one reason providers monitor pregnancies more closely and may recommend delivery before the due date for women over 40.
What Prenatal Care Looks Like
If you’re pregnant at 42, expect more appointments and more screening than a younger patient. Your provider will likely recommend a first-trimester ultrasound early on, partly because older mothers have higher rates of twins (especially if using fertility treatments) and partly to establish an accurate timeline.
Genetic screening is offered to all pregnant women regardless of age, but at 42 you’ll be considered a strong candidate for cell-free DNA screening (sometimes called NIPT), a blood test available as early as 10 weeks that checks for the most common chromosomal conditions. It’s a screening test, not a diagnosis. If results come back positive, you’d be offered a diagnostic procedure like amniocentesis (after 15 weeks) or chorionic villus sampling (between 10 and 13 weeks) to confirm. These diagnostic tests are definitive but carry a small risk of complications, so the decision is always yours.
A detailed anatomy ultrasound, typically done around 18 to 20 weeks, is recommended for women 35 and older to look for structural issues. If you have additional risk factors for preeclampsia, such as a first pregnancy, obesity, or a family history of high blood pressure, your provider may suggest a daily low-dose aspirin starting in the first trimester to reduce that risk.
IVF and Other Fertility Options
Many women at 42 turn to fertility treatments, and it’s worth being realistic about the success rates. IVF success with your own eggs declines significantly after 40. Live birth rates per IVF cycle for women 41 to 42 are typically in the range of 10 to 15%, depending on the clinic and individual factors. By 43 to 44, rates drop further.
Using donor eggs changes the equation dramatically. Because donor eggs come from younger women, the success rates reflect the donor’s age rather than yours. This makes donor egg IVF one of the most effective options for women in their early to mid-40s, with live birth rates often above 50% per transfer. Frozen eggs from your younger self, if you banked them earlier, work on the same principle.
If you’re 42 and considering fertility treatment, timing matters. Every few months makes a measurable difference in egg quality at this age, so most reproductive endocrinologists will recommend starting evaluation promptly rather than trying naturally for the standard year that younger couples are advised to wait.
What the Trend Data Shows
Having a baby at 42 is increasingly common. The birth rate for women aged 40 to 44 more than doubled between 1990 and 2023, from 5.5 to 12.5 births per 1,000 women. Births to women 40 and older went from 1.2% of all births to 4.1%. These numbers reflect both advances in fertility medicine and broader social shifts: more women pursuing education and careers before starting families, more access to egg freezing, and better prenatal care for older mothers.
The trend doesn’t erase the biological reality, but it does mean the medical system is far more experienced at supporting pregnancies in this age group than it was a generation ago. Monitoring protocols, screening technology, and management of complications like gestational diabetes and preeclampsia have all improved substantially.
Factors That Work in Your Favor
Age is the single biggest predictor of fertility, but it’s not the only one. Several things can tilt the odds at 42. General health matters more than many people realize: a healthy weight, well-controlled blood pressure, no smoking, and regular physical activity all improve both the chance of conceiving and the chance of a healthy pregnancy. If you have conditions like thyroid disease or diabetes, getting them well managed before conception makes a significant difference.
Your reproductive history also plays a role. If you’ve had a successful pregnancy before, your odds of another are generally better than if this is your first attempt. And individual variation in ovarian reserve is enormous. Some 42-year-olds have ovarian function that looks more like a typical 38-year-old, while others have already gone through most of their egg supply. Testing your AMH and doing an antral follicle count via ultrasound gives you a much clearer picture than age alone.
The honest answer to “is 42 too old to have a baby” is no, but the window is narrowing fast. The difference between 42 and 44 is much larger, biologically, than the difference between 32 and 34. If this is something you want, the best time to start pursuing it is now.