Vaginal Discharge: What Your Body Is Communicating — and When to Pay Attention

Vaginal discharge is one of the most consistent sources of information about your hormonal health — and one of the least discussed. Most women are given almost no education about what discharge is, how it changes across the cycle, and what variations signal.

Discharge is not a problem to be managed. It is a biological process, a fertility signal, and a window into the health of your vaginal microbiome, your hormonal balance, and your overall physiological state.

What Discharge Is

Vaginal discharge is a mixture of cervical mucus, vaginal secretions, and shed vaginal cells. It serves several purposes: keeping the vaginal environment clean and lubricated, maintaining the acidic pH that protects against infection, supporting fertility by creating the conditions for sperm survival around ovulation, and reflecting the health of the vaginal microbiome.

The cervix is the primary producer of mucus. The quantity, consistency, and appearance of that mucus is directly regulated by oestrogen and progesterone — making discharge a real-time readout of where you are in your cycle.

Discharge Across Your Cycle

Immediately after your period (days 1–5)

Little to no discharge. The post-menstrual phase is typically dry as oestrogen is at its lowest.

Early follicular phase (days 6–9)

Discharge begins as oestrogen rises. Initially scant and slightly sticky or white. The vaginal environment is becoming more active.

Approaching ovulation (days 10–13)

Discharge increases and becomes more watery. This is the body preparing for fertility — creating a more alkaline, sperm-friendly environment.

At ovulation (around day 14)

Discharge is at its most fertile: clear, stretchy, and resembling raw egg white. This is the classic "egg white cervical mucus" and indicates peak oestrogen and the LH surge. It can stretch between fingers without breaking — this elasticity is called spinnbarkeit in fertility medicine.

Luteal phase (days 15–28)

After ovulation, progesterone rises and cervical mucus thickens — forming a mucus plug that makes the cervix less hospitable to sperm. Discharge becomes creamier, white or off-white, and less abundant. As progesterone drops toward menstruation, discharge may thin slightly again.

What Variations Mean

Yellow or green discharge

Yellow-tinged discharge in small amounts can be normal at the end of a period. Yellow or green discharge with unusual smell, particularly outside the period, suggests bacterial infection — bacterial vaginosis or sexually transmitted infection — and warrants testing.

Grey or fishy-smelling discharge

Classic presentation of bacterial vaginosis — an overgrowth of anaerobic bacteria in the vaginal microbiome. BV is the most common vaginal infection in women of reproductive age and is not sexually transmitted, though sexual activity can disrupt vaginal pH. Requires antibiotic treatment.

Thick white cottage cheese discharge

Classic yeast (Candida) infection presentation. Often accompanied by itching or irritation. Triggered by antibiotic use, hormonal changes, high sugar diet, or immune suppression. Treatable with antifungals, but recurrent yeast infections warrant investigation of the underlying gut and immune picture.

Watery pink or brown discharge mid-cycle

Light spotting around ovulation is common and typically reflects the oestrogen dip that triggers the LH surge. Persistent pink or brown discharge outside of menstruation warrants medical assessment.

Increased discharge in perimenopause

Oestrogen fluctuations in perimenopause can cause increased discharge in high-oestrogen phases and dryness in low-oestrogen phases. Vaginal dryness and atrophy as oestrogen declines in menopause can also cause watery or light discharge from the atrophic vaginal tissue.

The Vaginal Microbiome and Discharge

Healthy vaginal discharge is maintained by a Lactobacillus-dominant microbiome that keeps vaginal pH between 3.8 and 4.5 — acidic enough to prevent pathogen overgrowth. When Lactobacillus is depleted — by antibiotics, hormonal changes, sexual activity, diet, or stress — pH rises and the character of discharge changes.

Supporting the vaginal microbiome means supporting the gut microbiome — they are directly connected. Fermented foods, fibre, and avoiding unnecessary antibiotic use all support vaginal health indirectly through the gut.

Frequently Asked Questions

Is vaginal discharge normal?

Yes — discharge is a normal and healthy biological process. The absence of discharge is not healthier than its presence; it simply reflects where you are in your cycle. Understanding your own baseline pattern — what is normal for you — is the most useful thing you can do.

How do I know if discharge is abnormal?

Discharge that is yellow, green, or grey, has an unusual smell (particularly fishy), is accompanied by itching or burning, or appears outside the pattern you know is normal for your cycle warrants assessment. A single change does not necessarily mean infection — but persistent changes do.

Why does discharge increase before my period?

As progesterone drops in the late luteal phase, the mucus plug that thickened after ovulation begins to dissolve. Some women notice an increase in discharge in the days before their period as the cervix opens slightly in preparation for menstruation.