Planning for a pregnancy is one of life's most exciting journeys. But before that positive pregnancy test might appear, there is a lot to be gained from truly understanding how your body works. The menstrual cycle and ovulation are central pieces of the fertility puzzle – and the more you know, the more confident and prepared you can feel.
In this article, we go through the basics of the menstrual cycle, how you can identify your ovulation, and what you can do right now to support your body in preparation for a future pregnancy.
The menstrual cycle – more than just your period
Many think of the menstrual cycle as only the days you have your period. But in reality, the cycle is a complex interplay of hormones that continues throughout the entire month. An average menstrual cycle is about 28 days long, but anything between 21 and 35 days is considered normal.
The cycle is divided into four phases:
The menstrual phase (days 1–5)
This is the phase most people are familiar with – the menstrual bleeding. The uterine lining is shed because no fertilized egg has attached. This is when the body starts over and prepares for a new cycle.
The follicular phase (days 1–13)
At the same time as the period is happening, the brain begins sending signals via the hormone FSH (follicle-stimulating hormone) which causes follicles in the ovaries to begin maturing. Usually, one follicle becomes dominant and continues to grow.
Ovulation (day 14)
When estrogen levels have reached a certain point, the hormone LH (luteinizing hormone) is released in a sharp surge, which triggers ovulation. The mature egg leaves the ovary and can be fertilized for about 12–24 hours.
The luteal phase (days 15–28)
After ovulation, the empty follicle transforms into a so-called corpus luteum, which produces progesterone. This hormone prepares the uterine lining for potential implantation. If fertilization does not occur, progesterone levels drop and a new period begins.
How do you know you are ovulating?
Knowing when you are ovulating is the key to maximizing your chances of getting pregnant. There are several signs to look out for:
Cervical mucus (discharge): During the days around ovulation, your discharge changes and becomes clearer, more elastic, and resembles raw egg whites. This is the body's way of making it easier for sperm to travel.
Basal body temperature: Your resting body temperature rises by about 0.2–0.5 degrees after ovulation due to the effect of progesterone. By measuring your temperature every morning before you get up, you can see a pattern over time.
Ovulation pain: Some women experience a slight dull ache or a twinge on one side of the lower abdomen. This is called mittelschmerz and is completely normal.
Increased sex drive: Many women notice that their libido increases naturally around ovulation – the body's own way of increasing the chances of fertilization.
Ovulation tests: LH tests are purchased at pharmacies and measure the level of luteinizing hormone in the urine. A positive test indicates that ovulation will likely occur within 24–36 hours.
The fertile window – your most important period
What determines whether fertilization can occur is the so-called fertile window. Sperm can survive in the uterus for up to five days, while the egg can only be fertilized for about a day. This means that your most fertile days are the five days before ovulation and the day of ovulation itself. Understanding your fertile window can make a huge difference when you are planning to get pregnant, as you will then know exactly which days are most strategic.
What can you do right now to support your fertility?
Regardless of whether you are planning a pregnancy within the next few months or further in the future, there are several things you can do to give your body the best possible conditions.
Start taking folic acid
The recommendation is to start taking folic acid (400 micrograms per day) at least one month before you try to get pregnant, preferably three months. Folic acid reduces the risk of neural tube defects in the fetus.
Eat a varied and nutritious diet
A balanced diet with plenty of vegetables, whole grains, healthy fats, and protein gives the body the building blocks it needs. Omega-3 fatty acids, iron, zinc, and vitamin D are particularly important for fertility.
Stay physically active
Regular exercise supports hormone balance, reduces stress, and improves blood circulation to the reproductive organs. Moderate exercise such as walking, yoga, or swimming is excellent.
Manage stress
Chronic stress can affect hormone balance and, in some cases, disrupt ovulation. Find strategies that work for you – meditation, time in nature, mindfulness, or simply more time for recovery.
Pay attention to your cycle
Start tracking your menstrual cycle now. Note the length of the cycle, any symptoms, and changes in discharge. This gives you an invaluable picture of how your body works and makes it easier to identify your ovulation when the time comes.
Review lifestyle factors
Smoking, high alcohol consumption, and significant weight changes can all negatively affect fertility. If you are thinking about pregnancy, it is a good time to review these habits.
When should you seek help?
Most couples who have regular intercourse during the fertile days become pregnant within a year. However, if you have been trying for more than twelve months without results (or six months if you are over 35), it may be wise to contact a midwife or gynecologist.
The same applies if you have irregular menstrual cycles, absent periods, severe pain, or suspect hormonal imbalances such as PCOS. Early investigation can make a big difference, and there is often good help available.
Summary
Understanding your menstrual cycle and ovulation is not just an advantage for those wanting to get pregnant – it is also a way to get to know your body deeply. By becoming aware of your cyclical patterns, listening to your body's signals, and taking care of yourself, you create the best conditions for both fertility and general well-being.
Whether you are at the beginning of your journey or have been thinking about it for a while: knowledge is power, and your body has more to tell you than you might think.
About the guest author: "Joakim runs Ägglossning.se, a Swedish site about fertility, health, and parenthood. With a focus on evidence-based information and accessible tools, the site helps thousands of women and couples understand their bodies and increase their chances of getting pregnant."
