Trying for a baby simply means having sex without using any form of contraception, with the intention of becoming pregnant. In medical terms, it’s often called “trying to conceive” or TTC, and the definition is straightforward: unprotected intercourse without preventing pregnancy. It doesn’t require ovulation kits, temperature charts, or any special tracking. If you’re having sex and not using birth control, you’re trying.
What It Actually Involves
At its most basic, trying for a baby means stopping whatever contraception you’ve been using and having regular sex. Fertility specialists define it strictly as unprotected intercourse, nothing more. Couples who have sex once or twice a week will typically conceive within six or seven months. You don’t need to time things perfectly or follow a rigid schedule for it to work.
That said, many couples choose to go beyond the bare minimum. They might start paying attention to the woman’s menstrual cycle, watching for signs of ovulation, or making lifestyle changes to improve their chances. None of that is required to qualify as “trying,” but it can help things along faster.
The Fertile Window and Timing
Pregnancy can only happen during a narrow window each cycle. An egg survives less than 24 hours after it’s released from the ovary, and the highest pregnancy rates occur when sperm meets the egg within four to six hours of ovulation. Sperm, however, can survive inside the body for up to five days. This means the days leading up to ovulation are just as important as ovulation day itself.
For a typical 28-day cycle, health providers suggest having sex between days 7 and 20 to cover the most likely fertile window. If you’d rather not track anything, having sex every one to two days throughout the month gives you strong odds. The American Society for Reproductive Medicine notes that pregnancy rates are nearly as good with sex two to three times per week compared to daily intercourse, so there’s no need to put pressure on yourselves to hit every single day.
How to Track Ovulation
Three main methods can help you pinpoint when ovulation is happening. None are required, but they can narrow your focus if you want to be more deliberate.
- Cervical mucus: As ovulation approaches, vaginal discharge becomes clear, slippery, and stretchy, often compared to raw egg whites. The last day you notice this type of mucus is most likely ovulation day. Having sex on days when this mucus is present gives you the highest probability of conceiving.
- Basal body temperature (BBT): Your resting body temperature rises by about 0.2 to 0.5°C after ovulation due to hormonal changes. By taking your temperature each morning before getting out of bed, you can confirm that ovulation occurred. The limitation is that BBT only tells you after the fact, so it’s more useful for learning your pattern over several cycles than for timing sex in the current one.
- Urinary hormone tests: Over-the-counter ovulation predictor kits detect a hormone surge that happens roughly 24 to 36 hours before ovulation. These give you a heads-up that your fertile window is open right now.
Realistic Odds by Age
Trying for a baby doesn’t guarantee quick results, and age is the biggest factor in how long it takes. A large North American study tracked thousands of couples and found clear patterns in how likely conception was within 12 cycles of trying.
For women aged 25 to 27, about 79% conceived within 12 cycles. That number held fairly steady through the early 30s: 78% for ages 28 to 30, and 77% for ages 31 to 33. The drop becomes more noticeable after 35, with 75% conceiving by 12 cycles at ages 34 to 36, dropping to 67% at ages 37 to 39. For women 40 to 45, the 12-cycle rate fell to about 56%, roughly three-quarters the likelihood of women in their early 20s.
These numbers mean that even for younger couples, it’s completely normal for conception to take several months. Not getting pregnant in the first cycle, or the first three, or even the first six, is not a sign that something is wrong.
Lifestyle Changes That Help
Once you decide to try, a few adjustments can improve your chances. These apply to both partners.
Weight matters more than most people realize. Obesity is linked to lower sperm count and quality in men, and in women with polycystic ovary syndrome, losing just 5% of body weight significantly improves the likelihood of ovulation and pregnancy. Being underweight also disrupts ovulation. Aiming for a healthy weight before conceiving gives both of you a better starting point.
Smoking tobacco, marijuana use, and heavy drinking all reduce fertility in both men and women. The same goes for illegal drugs like cocaine and heroin. If either partner uses any of these, stopping is one of the single most impactful things you can do. Stress, poor nutrition, and environmental toxin exposure also play a role, though they’re harder to quantify.
For men specifically, preconception health is often overlooked. Sperm quality is directly influenced by weight, diet, exercise, smoking, alcohol intake, and even chronic conditions like diabetes or thyroid disorders. Managing these before conception doesn’t just improve the odds of pregnancy; it can also influence outcomes for the baby.
Start Folic Acid Early
The CDC recommends that all women who could become pregnant take 400 micrograms of folic acid daily. This B vitamin dramatically reduces the risk of neural tube defects, which develop in the very earliest weeks of pregnancy, often before you even know you’re pregnant. Starting a folic acid supplement when you begin trying (or even before) is one of the simplest and most effective things you can do.
When the Timeline Matters
How long you’ve been trying becomes medically significant at different points depending on the woman’s age. Fertility specialists recommend seeking evaluation if you’re under 35 and have been trying for 12 months or more, between 35 and 40 and have been trying for 6 months or more, or over 40 and have been trying for 3 months or more. The shorter timelines for older women reflect the faster decline in egg quality and the value of not waiting when time is a factor.
These timelines assume you’ve been having regular unprotected sex. If you’ve only been having intercourse a few times a month, that doesn’t count the same way in a doctor’s assessment. For couples with infrequent sex, concentrating intercourse to every other day during the expected fertile window (three to four times around ovulation) helps make each cycle count.