
Ovulation is one of the most important events in a woman’s monthly cycle. It’s the moment an egg is released from the ovary, making conception possible. While it lasts only 12–24 hours, the hormonal preparation leading up to ovulation is a complex symphony involving the brain, ovaries, adrenal glands and even metabolic health. Healthy ovulation is a strong sign of a balanced endocrine system, good nutrient status, and overall wellbeing.
Ovulation doesn’t “just happen”—it only occurs when several key hormones rise and fall in perfect timing.
Released by the pituitary gland, FSH stimulates several follicles in the ovaries to grow. One becomes dominant and prepares to release the egg.
As the dominant follicle grows, it produces oestrogen. High oestrogen tells the brain that the egg is nearly ready. It also thickens the uterine lining and increases cervical fluid, creating a fertile environment.
When oestrogen reaches its peak, it triggers a sudden surge in LH. This LH surge is the final signal that causes the follicle to rupture and release the egg—this is ovulation.
After ovulation, the empty follicle becomes the corpus luteum, producing progesterone. This hormone stabilises the uterine lining, supports potential implantation and is essential for early pregnancy.
Often forgotten, but important—testosterone peaks around ovulation and boosts libido, energy and desire, making conception more likely.
The cycle begins with menstruation. Hormones are at their lowest, and the body sheds the uterine lining.
FSH stimulates follicle growth. Oestrogen rises, energy increases, mood improves, and the body prepares a fertile environment.
Triggered by the LH surge. Cervical mucus becomes clear and stretchy (“egg white” consistency), libido increases, and basal temperature will rise after ovulation has occurred.
Progesterone dominates, supporting implantation. If no pregnancy occurs, progesterone and oestrogen drop, leading to menstruation.
Ovulation pain—known as mittelschmerz—is common and usually harmless. It may occur on one side of the lower abdomen and can last minutes to 48 hours.
Possible causes include:
For some women it’s a dull cramp; for others, a sharp twinge. Severe or debilitating pain, however, may indicate endometriosis, ovarian cysts, or pelvic inflammation and should be assessed.
If ovulation doesn’t occur or is irregular, fertility is impacted. Hormonal issues may include:
Affects follicle development and egg quality.
Prevents the LH surge, leading to anovulation (lack of ovulation).
Can delay ovulation or disrupt the cycle completely.
Common with anovulation; affects luteal phase length and implantation.
Inhibits ovulation and can be caused by stress, thyroid issues, or medications.
Thyroid hormones directly influence ovulation and cycle regularity.
A major factor in PCOS, often preventing the process entirely.
Chronic stress suppresses the brain-ovary hormonal communication required for a healthy menstrual cycle.
Without ovulation, conception cannot occur. Even irregular ovulation can reduce fertility windows because:
Healthy, consistent ovulation is the key marker of reproductive health.
Ovulation is a finely tuned hormonal event that reflects overall health, nutrition, stress levels, thyroid function, and reproductive wellbeing. When hormones work in harmony, ovulation occurs smoothly—supporting fertility, cycle regularity, mood, energy, and healthy progesterone production.
Understanding your cycle helps you recognise when something is off and empowers you to make informed decisions about your hormonal and reproductive health.