Why are my periods delayed despite negative pregnancy tests?

Hello,

Welcome to icliniq.com.

I understand the concern.

You are experiencing delayed periods (secondary amenorrhea or delayed menstruation) along with the following findings:

• Negative urine pregnancy test.

• Normal pelvic ultrasound scan (USG - Ultrasonography).

• Normal thyroid function test.

Based on the above findings, the most likely diagnosis is a functional hormonal imbalance causing delayed menstruation. When pregnancy, thyroid disorders, and structural abnormalities are ruled out, the common causes include:

• Mental stress, anxiety, sleep disturbances, or recent lifestyle changes can affect ovulation, leading to delayed periods.

• If ovulation does not occur on time, menstruation can be delayed even when routine investigations are normal.

• In some cases, PCOS (Polycystic ovary syndrome) may not show obvious cysts on ultrasound, but can still cause menstrual irregularities.

• Even minor weight fluctuations, irregular meals, or low-calorie intake can disrupt the menstrual cycle.

• Use of emergency contraceptive pills or hormonal medications within the past two to three months can temporarily delay menstruation.

Unlikely conditions:

• Pregnancy (pregnancy test is negative).

• Thyroid disorder.

• Uterine or ovarian structural abnormalities.

• Serious underlying disease.

I would suggest the following measures:

• If the period delay is less than two weeks, observation and waiting are usually safe.

• If the delay exceeds seven to ten days, a short course of progesterone withdrawal therapy may be prescribed by a doctor to induce menstruation.

• If menstrual delays occur repeatedly, further hormonal evaluation may be advised, including prolactin.

• Luteinizing hormone (LH) and follicle-stimulating hormone (FSH).

• Evaluation for polycystic ovary syndrome.

Absence of periods for more than two months, severe lower abdominal pain, abnormal or heavy vaginal bleeding, and recurrent menstrual cycle irregularities are important warning signs and should prompt timely medical evaluation by a healthcare professional.

I hope you are satisfied with my answer. For further queries, you can consult me at iCliniq.

Thank you.