After ovulation how long does it take to get pregnant

Yes, although it's not very likely. If you have sex without using contraception, you can conceive (get pregnant) at any time during your menstrual cycle, even during or just after your period.

You can also get pregnant if you have never had a period before, during your first period, or after the first time you have sex.

There's no "safe" time of the month when you can have sex without contraception and not risk becoming pregnant.

But there are times in your menstrual cycle when you're at your most fertile, and this is when you're most likely to conceive.

Understanding your menstrual cycle

Your menstrual cycle begins on the first day of your period and continues up to the first day of your next period.

You're most fertile at the time of ovulation (when an egg is released from your ovaries), which usually occurs 12 to 14 days before your next period starts. This is the time of the month when you're most likely to get pregnant.

It's unlikely that you'll get pregnant just after your period, although it can happen. It's important to remember that sperm can sometimes survive in the body for up to 7 days after you have sex.

This means it may be possible to get pregnant soon after your period finishes if you ovulate early, especially if you have a naturally short menstrual cycle.

You should always use contraception when you have sex if you don't want to become pregnant.

Further information:

  • Can I get pregnant if I have sex without penetration?
  • Contraception
  • Periods
  • Emergency contraception
  • Natural family planning
  • Pregnancy guide
  • Baby guide

Page last reviewed: 8 July 2021
Next review due: 8 July 2024

It's impossible to say how long it takes to get pregnant because it's different for each woman.

Many factors can affect a couple's chances of conceiving, such as:

  • your age
  • your general health
  • your reproductive health
  • how often you have sex

Some women become pregnant quickly, while others take longer. This may be upsetting, but it's normal.

Fertility

Most couples will get pregnant within a year if they have regular sex and don't use contraception.

But women become less fertile as they get older.

The effect of age on men's fertility is less clear.

What does 'regular sex' mean?

Having regular sex means having sex every 2 to 3 days throughout the month.

Some couples may try to time having sex with when the woman ovulates (releases an egg).

But do not worry about the timing of when you have sex if it makes you feel stressed.

Fertility problems

Lots of factors can cause fertility problems, including:

  • hormonal (endocrine) disorders, such as polycystic ovary syndrome (PCOS) and problems with the thyroid or pituitary glands
  • physical disorders, such as obesity, anorexia nervosa or excessive exercise
  • disorders of the reproductive system, such as infections, blocked fallopian tubes, endometriosis or a low sperm count
  • menopause

Some of these factors affect either women or men.

The most common causes are ovulation failure (which can be caused by lots of different things) and sperm disorders.

Read more detailed information about the causes of infertility.

Getting help

If you have been trying for a baby for 1 year without success, see your GP for advice.

Further information

  • How can I tell when I'm ovulating?
  • Trying to get pregnant?
  • Doing a pregnancy test
  • Can I get pregnant just after my period has finished?
  • Pregnancy
  • Infertility
  • NICE guidelines: assessment and treatment for people with fertility problems

Page last reviewed: 8 September 2022
Next review due: 8 September 2025

To become pregnant, the following steps must occur:

  • Sperm transport — The sperm must be deposited and transported to the site of fertilization.
  • Egg transport — Ovulation must occur and the egg must be "picked up" by the tube.
  • Fertilization and embryo development — Union between the sperm and egg must result.
  • Implantation — The embryo must implant and begin to grow in the uterus.

These steps are described below.

Sperm Transport

The transport of sperm depends on several factors:

  • The sperm must be capable of propelling themselves through the environment of the female vagina and cervix.
  • This environment, which is under cyclic hormonal control, must be favorable to admit the sperm without destroying them.
  • The sperm must possess the capability of converting to a form that can penetrate the cell membrane of the egg (capacitation).

Following ejaculation, the semen forms a gel that protects it from the acidic environment of the vagina. The gel is liquefied within 20 to 30 minutes by enzymes from the prostate gland. This liquefaction is important for freeing the sperm so transportation may occur. The seminal plasma is left in the vagina.

The protected sperm with the greatest motility travel through the layers of cervical mucus that guard the entrance to the uterus. During ovulation, this barrier becomes thinner and changes its acidity, creating a friendlier environment for the sperm. The cervical mucus acts as a reservoir for extended sperm survival.

Once the sperm have entered the uterus, contractions propel the sperm upward into the fallopian tubes. The first sperm enter the tubes minutes after ejaculation. The first sperm, however, are likely not the fertilizing sperm. Motile sperm can survive in the female reproductive tract for up to five days.

Egg Transport

Egg transport begins at ovulation and ends once the egg reaches the uterus. Following ovulation, the fimbriated, or finger-like, end of the fallopian tube sweeps over the ovary. Adhesive sites on the cilia, which are located on the surface of the fimbriae, are responsible for egg pickup and movement into the tube. The cilia within the tube, and muscular contractions resulting from the movement of the egg, create a forward motion. Transport through the tube takes about 30 hours.

Conditions such as pelvic infections and endometriosis can permanently impair the function of the fallopian tubes, due to scarring or damage to the fimbriae.

Fertilization and Embryo Development

Following ovulation, the egg is capable of fertilization for only 12 to 24 hours. Contact between the egg and sperm is random.

Once the egg arrives at a specific portion of the tube, called the ampullar-isthmic junction, it rests for another 30 hours. Fertilization — sperm union with the egg — occurs in this portion of the tube. The fertilized egg then begins a rapid descent to the uterus. The period of rest in the tube appears to be necessary for full development of the fertilized egg and for the uterus to prepare to receive the egg.

Defects in the fallopian tube may impair transport and increase the risk of a tubal pregnancy, also called ectopic pregnancy.

A membrane surrounding the egg, called the zona pellucida, has two major functions in fertilization. First, the zona pellucida contains sperm receptors that are specific for human sperm. Second, once penetrated by the sperm, the membrane becomes impermeable to penetration by other sperm.

Following penetration, a series of events set the stage for the first cell division. The single-cell embryo is called a zygote. Over the course of the next seven days, the human embryo undergoes multiple cell divisions in a process called mitosis. At the end of this transition period, the embryo becomes a mass of very organized cells, called a blastocyst. It's now believed that as women get older, this process of early embryo development is increasingly impaired due to diminishing egg quality.

Implantation

Once the embryo reaches the blastocyst stage, approximately five to six days after fertilization, it hatches out of its zona pellucida and begins the process of implantation in the uterus.

In nature, 50 percent of all fertilized eggs are lost before a woman's missed menses. In the in vitro fertilization (IVF) process as well, an embryo may begin to develop but not make it to the blastocyst stage — the first stage at which those cells destined to become the fetus separate from those that will become the placenta. The blastocyst may implant but not grow, or the blastocyst may grow but stop developing before the two week time at which a pregnancy can be detected. The receptivity of the uterus and the health of the embryo are important for the implantation process.

How many days after ovulation will I be pregnant?

You're not pregnant until the embryo implants itself into the uterine lining. Embryo implantation takes place between 5 and 10 days after ovulation. It usually takes another several days before you will get a positive result on a pregnancy test.

How do you know if you get pregnant after ovulation?

A pregnancy test can detect pregnancy before a woman misses her period, but some may notice symptoms even earlier than this. The first sign of pregnancy is often a missed period, which happens around 15 days past ovulation (DPO).

Can I get pregnant 2 days after ovulation?

"Most pregnancies result from sex that happened less than 2 days before ovulation," Manglani says. But you can get pregnant earlier or later. "Sperm can live in fertile cervical mucus for up to 5 days," she says. An egg can live up to 24 hours after ovulation.