Calculateur d'ovulation
Trying for a baby? Use our ovulation calculator to estimate your most fertile days and boost your chances of getting pregnant.
Revu par Patient infomatics teamAuthored by Patient infomatics teamPublié à l'origine 15 Jul 2025
Respecte les directives éditoriales
- TéléchargerTélécharger
- Partager
- Language
- Discussion
- Version audio
- Add to preferred sources on Google
At a glance
An ovulation calculator estimates your fertile window for conception.
It uses your last period date and average cycle length.
Irregular periods make calculators less accurate, but other methods can help.
Signs of ovulation include changes in discharge and mild pelvic pain.
Maintaining a healthy weight and taking folic acid can improve fertility.
If over 35, seek medical advice after six months of trying to conceive.
Sign up for our free 8-week Healthy Pregnancy course!
Each week we’ll share useful information and essential tips on topics such as nutrition, exercise, mental health, symptoms to look out for, and preparing for childbirth, to help you navigate your pregnancy journey whatever stage you are at.
By subscribing you accept our Politique de confidentialité. Vous pouvez vous désabonner à tout moment. Nous ne vendons jamais vos données.
Dans cet article:
Video picks for General pregnancy information
Continuez à lire ci-dessous
How does the ovulation calculator work?
The ovulation calculator uses the date of your last period and your average cycle length to estimate your fertile window — the days when you're most likely to conceive. Ovulation usually happens about 14 days before your next period. By predicting this window, the tool helps you time sex or insemination for the best chance of success.
Tip: Having sex every 2–3 days throughout your cycle can also help ensure sperm is always available when ovulation occurs.
What if my periods are irregular?
Retour au sommaireIrregular periods can make it harder to predict ovulation with a calculator alone. If your cycles vary significantly from month to month, consider:
Using ovulation predictor kits (which detect hormone surges in urine)
Tracking cervical mucus changes (it becomes clearer and stretchier around ovulation)
Monitoring basal body temperature (a slight increase signals ovulation has occurred)
If you're concerned about irregular periods, speak to your GP.
Continuez à lire ci-dessous
How will I know if I am ovulating?
Retour au sommaireSigns you may be ovulating include:
A change in vaginal discharge — becoming clearer, slippery, and stretchy
A slight rise in basal body temperature
Increased sex drive or heightened senses (such as smell or taste)
Using a combination of these signs alongside a calculator or ovulation test can improve accuracy.
How else can I increase my chances of getting pregnant?
Retour au sommaireImproving your general health can support fertility. You can try:
Maintaining a healthy weight – being under-or overweight can affect ovulation
Taking folic acid before conception
Avoiding smoking, excess alcohol and caffeine
Managing stress, which can impact hormone balance
If you've been trying to conceive for over a year (or six months if over 35), consider seeking medical advice.
Patient picks for General pregnancy information
Santé sexuelle
Fertility diet: what to eat when you're trying to get pregnant
Avec l'infertilité touchant jusqu'à une femme sur sept au Royaume-Uni, il est important de faire tout notre possible pour soutenir et protéger nos fonctions corporelles impliquées dans la conception d'un enfant. Cela commence par notre alimentation - quelque chose que nous pouvons contrôler chaque jour. Nous avons parlé à un spécialiste de la fertilité de ce qu'il faut manger et éviter dans le cadre d'un régime pour favoriser la fertilité.
par Amberley Davis
Hormones
8 common myths about PCOS (Polycystic Ovary Syndrome)
Polycystic ovary syndrome is one of the most common yet misunderstood women's health conditions. With misinformation circulating the internet, we sort fact from fiction and explore how myths about PCOS might be harming women with this condition.
par Amberley Davis
Sign up for our free 8-week Healthy Pregnancy course!
Each week we’ll share useful information and essential tips on topics such as nutrition, exercise, mental health, symptoms to look out for, and preparing for childbirth, to help you navigate your pregnancy journey whatever stage you are at.
By subscribing you accept our Politique de confidentialité. Vous pouvez vous désabonner à tout moment. Nous ne vendons jamais vos données.
Questions fréquemment posées
What specifically does the ovulation calculator need to work accurately?
The ovulation calculator requires two key pieces of information to estimate your fertile window accurately: the date of your last period and the typical length of your menstrual cycle.
How do ovulation predictor kits help determine my fertile window?
Ovulation predictor kits work by detecting surges in specific hormones within your urine. These surges indicate that ovulation is likely to occur soon, helping you to pinpoint your fertile window more precisely, especially if you have irregular periods.
Can monitoring my body temperature really help me tell if I've ovulated?
Yes, monitoring your basal body temperature (BBT) can indicate that ovulation has occurred. There is typically a slight rise in your BBT after ovulation, which can be charted to help understand your cycle patterns.
Are there any natural body changes I can look for that suggest I'm ovulating?
Yes, you might notice changes in your vaginal discharge, which often becomes clearer, more slippery, and stretchy around ovulation. Some people also experience mild pelvic or abdominal pain. Additionally, you might observe a slight rise in your basal body temperature, or even feel an increased sex drive or heightened senses like smell or taste.
How often should I be having sex to maximise my chances of conception?
To maximise your chances of conception, it's recommended to have sex every 2–3 days throughout your entire menstrual cycle. This ensures that sperm is consistently available when ovulation occurs, increasing the likelihood of fertilisation.
Why is it important to consider my general health when trying to conceive?
Improving your general health is crucial for supporting fertility. Factors such as maintaining a healthy weight, avoiding smoking, excessive alcohol and caffeine, and managing stress can all positively impact your chances of conceiving by optimising hormone balance and ovulation.
Continuez à lire ci-dessous
About the authorView full bio
Équipe d'informatique des patients
The Patient.info Informatics Team ensures our medical content and tools are accurate, evidence-based, and aligned with trusted NHS and NICE guidance.
About the reviewerView full bio
Équipe d'informatique des patients
The Patient.info Informatics Team ensures our medical content and tools are accurate, evidence-based, and aligned with trusted NHS and NICE guidance.
Historique de l'article
Les informations sur cette page sont rédigées et examinées par des cliniciens qualifiés.
15 Jul 2025 | Publié à l'origine
Écrit par :
Équipe d'informatique des patientsRevu par
Équipe d'informatique des patients
Demandez, partagez, connectez-vous.
Parcourez les discussions, posez des questions et partagez vos expériences sur des centaines de sujets de santé.
Vous ne vous sentez pas bien ?
Évaluez vos symptômes en ligne gratuitement
Inscrivez-vous à la newsletter Patient
Votre dose hebdomadaire de conseils de santé clairs et fiables - rédigés pour vous aider à vous sentir informé, confiant et maître de la situation.
By subscribing you accept our Politique de confidentialité. Vous pouvez vous désabonner à tout moment. Nous ne vendons jamais vos données.