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  • Writer's pictureGrace Health

How long does it take to conceive after unprotected sex?

Updated: Mar 28, 2022

Trying to conceive may seem difficult and confusing to many. Understanding the whole scientific process behind it might help shed light on the topic. However, you could still wonder how long it takes.

Simply put, the egg and sperm can meet between 12 to 24hrs after unprotected sexual intercourse. Many couples expect that it’s straightforward after this step but there’s more to it. Here’s how reproduction works, how to time it, and how to maximize your chances of getting pregnant.


Step one: Fertilization

Fertilization occurs when the sperm manages to swim to meet the ovulated egg, It attaches itself to the egg to form a zygote. Usually, this takes place in the fallopian tube and not in the uterus. In order for this to happen, a woman needs to be in her fertile window. This means that one or more eggs have matured enough to be released from the ovary, ready to get fertilized by a sperm(s). Fertilization happens 12- 24 hours after sperms have been released and are on their way down the tube.


This might sound bleak but don't worry. Sperms can live up to 3-5 days. This means that having unprotected sex for about a week to ovulation could be sufficient to have the egg fertilized by the sperm.

There is a possibility to conceive after having sex a week before ovulation. It is important to note that conception can still occur soon after having sex because the sperm would meet the egg quickly after ejaculation.

Step two: Implantation

This is the process where the embryo reaches the uterus and attaches itself to the endometrium: the lining covering the inside of the uterus. This happens after conception. The implanted embryo will begin to grow and develop into a fetus.


At this stage, you are likely to experience symptoms such as period absence, swollen breasts, nausea, and in some cases lower abdominal pain similar to cramps. However, a few women may experience small blood flow referred to as implantation bleeding.


Step three: The pregnancy test

This tests for a positive or negative result of a pregnancy hormone called Human chorionic gonadotropin Hcg, which is usually released by the body. The amount of Hcg quickly increases during the first few weeks of a normal pregnancy. It is detectable within the early phase of pregnancy, often it could even before you noticed you missed your period. In some scenarios. It is possible to test positive for pregnancy and having your period days later. This is a result of something called a chemical pregnancy.

Meaning it's too early to be considered as a miscarriage.


You can purchase a home pregnancy testing kit at supermarkets, drugstores, or online. Make sure the pregnancy test kit is not expired. Ensure that you follow all instructions and follow up with your doctor if you have a positive result or if you have a negative result but your period does not start.

In cases where symptoms are not present, you might want to go for a blood test. Although it is not really required, a few medical conditions will need blood samples of Hcg. For example, sudden onset of severe abdominal pain, if you've had a miscarriage and a late period lasting more than one 1month.


Step Four: Early pregnancy symptoms

It is advisable to have a pregnancy test after a more than 2 weeks delay in your period, to confirm the possibility of pregnancy. A positive test tells you that you are pregnant!

Some early pregnancy symptoms are:

  • Fatigue

  • Severe Nausea and vomiting

  • Heightened senses (sense of smell and sense of taste)

  • Frequent urination

  • Tender breast

These symptoms may occur within the 8th to 12week of pregnancy.

How can you increase your chances of getting pregnant?

Here are some tips and important things to note to maximize your chances:

  • Regular sex every second day or more during the week before ovulation- when the fertile window is open!

  • Learn to identify your fertile window and ovulation by tracking signs like fertile discharge, increase in baseline body temperature by using the Grace Health App.

  • Avoid alcohol, tobacco, emergency pills, and other contraceptive methods

  • Maintain a healthy diet and weight by eating food rich in vitamins.

  • Avoid stressful activities and situations.


In summary

  • There are four steps you need to take into consideration when trying to conceive. These are Fertilization, Implantation, early pregnancy signs and symptoms, and how to test for pregnancy.

  • Regular sex every second day or more during the week before ovulation- the best time for conception is when your fertile window is open.

  • It is also important to maintain a healthy lifestyle as you begin this journey. Stay informed and stay in control. What have you learned in this blog post today? Share with us in the comments below.

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53 Comments


shannon mike
shannon mike
Mar 11

I contracted herpes from my Ex boyfriend, we broke for this reason because he left to be with another girl, i still loved him despite what he did to me, i tried to get him back but up to no avail, i told my friend then she referred to a relationship specialist, i contacted him and told him my problem, he assured me that everything will be alright in no time, i did not believe at first, i gave him a try, behold!!, after 48 hours, my boyfriend came back begging me to give him a second chance, which i gladly did, we came together, he now loves me more than before, this is a miracle, unbelievable, The relationship specialist…

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Guest
Aug 23, 2023

Hi everyone. These conception dates are confusing me, according the pregnancy App I conceived on the 12th of January 2023 and my last period was 27th of December 2022. And the last intercourse I had was on the 29th of December, could it the one that lead to my pregnancy?

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Guest
Jan 05, 2023

Hello everyone, I am from Wembley, Britain. I want to write this testimony to tell others and thank Dr. Odunga for what he has done for me. The first 12 years of my marriage I had 5 miscarriages and I was called all sorts of names by my mother-in-law and this made my marriage life very hectic and a burden of sorrow. I contacted Dr. Odunga for help and I will say that he is a very strong and honest man and he indeed helped me solve my problem. I saw his email in a testimony and I contacted him, little did I know it would be the end of all my problems. After 2 days of contact, I received…

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Guest
Nov 24, 2022

I was tested Herpes positive and ever since then i have been taking different kinds of medicine but yet no improvement until i saw testimonies on the internet of how Robinson buckler has been curing different people from different kinds of diseases, immediately i contacted him. After our discussion he prepared the medicine and send it to me, which i received and took according to his instructions. Now my doctor just confirmed me HSV2 negative. My heart is so filled with joy, thank you so much Robinson buckler for curing me. If you are reading this and you are suffering from HSV or any other disease or you want to fix your broken marriage/relationship or maybe get back with your…

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Guest
Oct 05, 2022

Hi Grace, how can I get pregnant with baby boy?

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