Menstruation always comes after ovulation.
Vaginal bleeding without ovulation is not
menstruation at all, but is called but
spotting, or metrorrhagia. Menstrual
periods without ovulation are usually
irregular. Sometimes spotting can occur
regularly every month, but the bleedings
are not termed "menstruations" but are
called "false menstruations", or
pseudomenstruations. One of the
manifestations of Polycystic ovarian
syndrome (PCOS) is lack of ovulation and
irregular cycles. Metformin is used for
treating PCOS. PCOS is endocrine disorder
with an unknown reason.
In your case, getting your period after
taking metformin doesn’t mean that you
have experienced ovulation. Ovulation can
be proven in a few ways:
1. by measuring the body
temperature-several hours after ovulation,
the body temperature increases for a
little;
2. by using ovulation predictor kits
(OPK)-several hours before ovulation,
Luteinisating hormone (LH) level peaks can
be registered by the OPK, and
3. detecting the hormone progesterone in
the second phase of the cycle; after
ovulation, the ovulated follicle turns
into a yellow body that produces
progesterone.
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