Differential Diagnosis for Starting Period Earlier than Normal
- Single Most Likely Diagnosis
- Menstrual irregularity due to hormonal fluctuations: This is the most common cause of irregular periods, including early periods, and can be influenced by factors such as stress, weight changes, or polycystic ovary syndrome (PCOS).
- Other Likely Diagnoses
- Pregnancy complications (e.g., miscarriage or ectopic pregnancy): These conditions can cause vaginal bleeding that may be mistaken for an early period.
- Uterine fibroids or polyps: These growths can cause irregular menstrual bleeding, including early periods.
- Intrauterine device (IUD) or other contraceptive side effects: Certain types of birth control, such as IUDs, can cause changes in menstrual bleeding patterns.
- Thyroid disorders: Both hyperthyroidism and hypothyroidism can affect menstrual regularity.
- Do Not Miss Diagnoses
- Ectopic pregnancy: Although less common, an ectopic pregnancy can cause vaginal bleeding and must be ruled out to prevent serious complications.
- Molar pregnancy: A rare condition where a non-viable fertilized egg implants in the uterus, causing abnormal bleeding.
- Ovarian cyst rupture or torsion: These conditions can cause severe abdominal pain and vaginal bleeding, requiring immediate medical attention.
- Rare Diagnoses
- Premature ovarian failure (POF): A condition where the ovaries stop functioning before the age of 40, leading to irregular or early periods.
- Adrenal gland disorders (e.g., Cushing's syndrome): Certain adrenal gland conditions can affect hormone production, leading to menstrual irregularities.
- Pituitary gland tumors: Although rare, pituitary tumors can disrupt hormone production, causing changes in menstrual patterns.