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What are the causes of menstrual cycle delay?

Stress
Anxiety
Exhaustion
Emotional instability
Hormonal disturbance
PCO polycystic ovary
Thyroid dysfunction
Pelvic inflammatory diseases
Endometritis

What are the symptoms of pregnancy?

Amenorrhea (no menses)
Low back pain
Frequent urination
Changes in breast size and color
Changes in libido
Nausea and morning sickness

What are the test required?

Pregnancy test
Complete blood count
Ultrasound on abdomen
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