prolactin
Reproductive EndocrinologyBlood sampleResults 2-3 daysNo fasting
Prolactin
Prolactin is a hormone made by the pituitary gland that supports breast milk production. This test measures its blood level.
Sample
Blood
Results
2-3 days
Fasting
Not required
Follow-up
Optional add-on
What this test detects
Prolactin
ECLIA · serum
Quantitative · ng/mL
When to get this test
Menstrual irregularity
High prolactin can disturb periods and is checked when cycles are irregular or absent.
Fertility work-up
Elevated prolactin can affect ovulation and is part of a fertility assessment.
Unexplained milk production
Helps evaluate breast milk discharge that is not related to breastfeeding.
How to prepare
01
Tell the lab if you have recently had breast stimulation or strenuous exercise, as these can temporarily raise prolactin.
Common questions
What can temporarily raise prolactin?
Stress, recent breast stimulation, exercise, and certain medicines can raise prolactin for a short time. Try to be rested and calm before sampling.
Why is prolactin checked in fertility?
High prolactin can interfere with ovulation and the menstrual cycle, so checking it helps complete the fertility picture.