1 DPO: The First Day of the Two-Week Wait

One day past ovulation (1 DPO) is the first day of what many people call the two-week wait. Nothing you can see or test for has happened yet, but your body has already switched into a new phase. Here is what is going on today, what any twinges probably mean, and how to plan the next two weeks without testing too early.

What happens at 1 DPO

After the egg leaves its follicle, it can be fertilized for only up to about 12 hours.¹ Fertilization, if it happens, usually takes place in the fallopian tube.² Sperm can survive there for several days, which is why the days before ovulation matter most. In a study of 221 women trying to conceive, every pregnancy came from sex during a six-day window that ended on the estimated day of ovulation.³ If you had sex in that window, the timing part of this cycle is already done.

Meanwhile, the empty follicle becomes the corpus luteum, a small gland that makes increasing amounts of progesterone.¹ Progesterone thickens the uterine lining so it can nourish a possible embryo, and it nudges your resting body temperature up slightly until your next period starts.¹ If you chart basal body temperature, that rise is often the first sign that ovulation really happened.

If an egg was fertilized, it is now a single cell called a zygote. Over the next 3 to 5 days it divides and travels toward the uterus.²

1 DPO symptoms

There are no pregnancy symptoms at 1 DPO. A fertilized egg at this stage cannot produce a signal your body would notice. What you feel today comes from ovulation and rising progesterone, and it happens in every ovulatory cycle, pregnant or not.

That includes a one-sided ache left over from ovulation (see does ovulation cause cramps?), a temperature shift and changes in cervical mucus. It helps to know how late real pregnancy symptoms usually start. In a prospective study that followed women from before conception, half of those who went on to have a baby first noticed symptoms by day 36 after their last period began.⁴ That is roughly three weeks after ovulation in a typical cycle.

Can you get a positive pregnancy test at 1 DPO?

No. Home tests detect hCG, and hCG enters the body only once an embryo begins to implant. In the NIH study that defined implantation by the first appearance of hCG, the hormone showed up 6 to 12 days after ovulation in pregnancies that continued, and 84% implanted on day 8, 9 or 10.⁵ A test taken today cannot pick up a pregnancy from this cycle.

1 DPO and implantation

Implantation is still about a week away. The embryo needs time to travel and grow, and attachment to the uterine wall starts around 6 days after fertilization.² So any spotting or cramping today is not implantation bleeding. If you see spotting now, it is more likely related to ovulation itself. Our implantation pages explain what is known about timing and appearance later in the wait.

What to do now

Write down your ovulation day. Enter it in the DPO calculator so you know which day you are on and when testing starts to make sense.

Plan your first test, not today's. The FDA says the most reliable results come from testing after a missed period, and that some sensitive tests can detect pregnancy a little earlier.⁶ Our guide to how many days after ovulation you can test walks through the evidence day by day.

Give the next 13 days some structure. Waiting is hard, especially after several cycles. Our page on coping with the two-week wait has practical ideas, and you can follow the days with us: tomorrow's page is 2 DPO.

Learn from this cycle either way. If your ovulation day was a guess, consider confirming it next time. Not pregnant this cycle? Track smarter with the ovulation calculator and the guides in Try.