Pregnancy: Conception – Maternity – Trimester
Diabetes, insulin resistance, metabolic disorders, and female fertility

Diabetes, insulin resistance, metabolic disorders, and female fertility

Why metabolism matters for fertility Fertility is not controlled by the ovaries alone. Ovulation depends on pulsatile gonadotropin-releasing hormone from the hypothalamus, follicle-stimulating hormone and luteinizing hormone from the pituitary, ovarian estrogen and progesterone production, and the ability of the endometrium to become receptive to an embryo. Metabolic signals, including insulin, leptin, glucose availability, inflammatory […]

Autoimmune diseases and fertility

Autoimmune diseases and fertility

Why the immune system matters in reproduction Reproduction is not immunologically passive. Ovulation involves controlled inflammation, sperm must survive within the reproductive tract, the embryo must implant into the endometrium, and the maternal immune system must tolerate a genetically distinct pregnancy while still protecting against infection. Autoimmune disease can disturb this balance when immune responses […]

Pelvic inflammatory disease and infertility

Pelvic inflammatory disease and infertility

Understanding pelvic inflammatory disease Pelvic inflammatory disease is usually caused by microorganisms ascending from the cervix or vagina into the upper genital tract. It most often affects sexually active people of reproductive age. The organisms classically associated with PID include Chlamydia trachomatis and Neisseria gonorrhoeae, but PID is frequently polymicrobial, meaning vaginal and anaerobic bacteria […]

Cervical mucus problems and conception

Cervical mucus problems and conception

Why cervical mucus matters for conception Cervical mucus is produced by glands in the cervix under the influence of ovarian hormones. Although it may seem like ordinary discharge, it is a dynamic biologic fluid with several reproductive functions. Outside the fertile window, mucus is typically thicker and less penetrable, forming a barrier that helps protect […]

Uterine abnormalities and fertility

Uterine abnormalities and fertility

Understanding uterine abnormalities The uterus develops from paired embryologic structures called the Müllerian ducts. During typical development, these ducts elongate, fuse in the midline, and the central partition between them is resorbed to create a single uterine cavity. When any part of this sequence is incomplete, the result may be a congenital uterine anomaly. These […]

Hyperprolactinemia: high prolactin, ovulation impact, and symptoms

Hyperprolactinemia: high prolactin, ovulation impact, and symptoms

What prolactin is and why hyperprolactinemia matters Prolactin is produced mainly by lactotroph cells in the anterior pituitary gland. Under usual circumstances, dopamine from the hypothalamus acts as a brake on prolactin secretion. When dopamine signaling is reduced, or when pituitary lactotroph cells are overactive, prolactin can rise. During pregnancy and lactation, high prolactin is […]

Thyroid disorders and fertility

Thyroid disorders and fertility

Why the thyroid matters for fertility The thyroid gland produces thyroxine, or T4, and triiodothyronine, or T3. These hormones influence metabolism in nearly every tissue, including the ovaries, endometrium, liver, and pituitary gland. In reproductive physiology, thyroid function is closely linked to the hypothalamic-pituitary-ovarian axis, the hormonal network that coordinates follicle development, ovulation, luteal function, […]

Progesterone deficiency and fertility

Progesterone deficiency and fertility

Progesterone’s role in the fertile cycle Progesterone is produced mainly by the corpus luteum, the temporary endocrine structure that forms in the ovary after ovulation. In the first half of the menstrual cycle, estrogen helps the endometrium grow. After ovulation, progesterone changes that lining into a secretory, implantation-ready tissue. It influences endometrial glands, blood vessel […]

Luteal phase defect explained

Luteal phase defect explained

What is the luteal phase? The menstrual cycle is often divided into two broad halves. The follicular phase begins with menstruation and leads up to ovulation. The luteal phase begins after ovulation, when the ruptured follicle transforms into the corpus luteum, a temporary hormone-producing structure in the ovary. The corpus luteum produces progesterone, along with […]

Anovulation: causes, detection, chronic patterns, and fertility impact

Anovulation: causes, detection, chronic patterns, and fertility impact

What anovulation means In a typical ovulatory menstrual cycle, coordinated signals from the hypothalamus, pituitary gland, ovaries, and uterus lead to follicle development, a mid-cycle luteinizing hormone surge, egg release, progesterone production after ovulation, and then either pregnancy or menstrual bleeding. Anovulation interrupts this sequence: a follicle may not mature properly, the hormonal surge may […]