Negative pregnancy test but 1 week delayed?

Possible causes of a delayed period and a negative pregnancy test:

- Implantation delay: In some cases, implantation of a fertilized egg into the uterine wall can take longer than usual, leading to a delay in the start of your period. This can cause a false negative on a pregnancy test.

- Irregular cycles: Some women have naturally irregular menstrual cycles, and their period may occasionally be a week or more late. This can be due to various factors such as stress, diet, travel, or illness.

- Hormonal imbalances: Hormonal imbalances, such as high levels of estrogen or low levels of progesterone, can disrupt your menstrual cycle and cause a delay in your period.

- Thyroid problems: Thyroid issues, such as hypothyroidism (underactive thyroid), can cause irregular periods or a delayed period.

- Polycystic Ovary Syndrome (PCOS): PCOS is a hormonal disorder that can affect ovulation and menstrual cycles, leading to irregular periods or a delayed period.

- Certain medications: Some medications, such as birth control pills, hormone therapy, or certain antipsychotic drugs, can affect your menstrual cycle and potentially cause a delayed period.

- Pregnancy complications: In rare cases, a negative pregnancy test and a delayed period could indicate a pregnancy complication, such as an ectopic pregnancy or a miscarriage.

If your period is more than a week late and you are concerned, it is recommended to consult with a healthcare professional for an evaluation. They can perform a more sensitive blood pregnancy test or do further tests to determine the cause of the delayed period and provide appropriate treatment or guidance.