Related Experiment Video

Updated: Sep 21, 2026

Effect of Male Accessory Gland Products on Egg Laying in Gastropod Molluscs
15:19

Effect of Male Accessory Gland Products on Egg Laying in Gastropod Molluscs

Published on: June 22, 2014

The effect of lactation on ovulation and fertility

S Chao

    Clinics in Perinatology
    |March 1, 1987
    PubMed

    It has long been recognized that women who breastfeed their children have a longer period of amenorrhea and infertility following delivery than do those women who do not breastfeed. The length of postpartum amenorrhea is quite variable, and depends on several factors, including maternal age and parity, and the duration and frequency of breastfeeding. In general, it would appear that the more frequent and the longer the episodes of breastfeeding, the longer will be the period of anovulation, and the longer the period of infertility.

    Keywords:
    Barrier MethodsBiologyBreast FeedingCondomContraceptionContraceptive Usage--contraindicationsDemographic FactorsDeveloping CountriesFamily PlanningFamily Planning, Behavioral MethodsFertilityHealthHuman MilkInfant NutritionInfertilityIudLactationLactation, ProlongedLiterature ReviewMaternal PhysiologyNutritionOral ContraceptivesOvulationPhysiologyPopulationPopulation DynamicsPostpartum AmenorrheaPostpartum WomenPregnancyPuerperiumReproductionReproductive BehaviorVaginal Diaphragm

    More Related Videos

    Methods for Studying Uterine Contributions to Pregnancy Establishment in an Ovariectomized Mouse Model06:49

    Methods for Studying Uterine Contributions to Pregnancy Establishment in an Ovariectomized Mouse Model

    Published on: April 7, 2023

    Analysis of Electrocardiograms and Behavior in Mice from Pregnancy to Lactation Period06:40

    Analysis of Electrocardiograms and Behavior in Mice from Pregnancy to Lactation Period

    Published on: April 5, 2024

    Related Concept Videos

    Oogenesis02:07

    Oogenesis

    In human women, oogenesis produces one mature egg cell or ovum for every precursor cell that enters meiosis. This process differs in two unique ways from the equivalent procedure of spermatogenesis in males. First, meiotic divisions during oogenesis are asymmetric, meaning that a large oocyte (containing most of the cytoplasm) and minor polar body are produced as a result of meiosis I, and again following meiosis II. Since only oocytes will go on to form embryos if fertilized, this unequal...
    Feedback Regulation of Calcium Concentration01:27

    Feedback Regulation of Calcium Concentration

    Calcium is an essential signaling molecule required for various cellular functions. Calcium pumps and ion channels on cell and organellar membranes, such as those on the endoplasmic reticulum (ER), regulate calcium concentrations inside the cell. They remain closed, keeping the cytosolic calcium levels low at a resting state.
    Various transmembrane receptors, such as G protein-coupled receptors (GPCRs), elicit a response to extracellular signals by increasing cytosolic calcium. Activated GPCRs...
    Hormonal Regulation of the Menstrual Cycle01:22

    Hormonal Regulation of the Menstrual Cycle

    The ovarian cycle regulates endometrial changes throughout a single menstrual cycle via the coordinated action of gonadotrophin-releasing hormone (GnRH) and gonadotrophins.
    At puberty, GnRH begins a pulsatile release pattern, which triggers the anterior pituitary gland to secrete follicle-stimulating hormone (FSH) and luteinizing hormone (LH). The frequency and amplitude of GnRH pulses vary across the menstrual cycle, with faster pulses favoring LH release and slower pulses favoring FSH release.
    Ovarian Cycle01:27

    Ovarian Cycle

    The menstrual cycle includes a critical component known as the ovarian cycle, which undergoes two main phases each month—the follicular phase and the luteal phase. The follicular phase is variable and averaging around 14 days. Ovulation, triggered by a surge in luteinizing hormone (LH), marks the transition between the two phases. The second phase, the luteal phase, is relatively consistent, lasting approximately 14 days, and is marked by the activity of the corpus luteum. While a cycle length...
    Oogenesis01:22

    Oogenesis

    Oogenesis,  the process of developing egg cells (female gametes), occurs within the ovaries and is fundamental to female fertility. This sequence begins during fetal development when diploid oogonia in the developing ovaries undergo mitotic divisions to produce primary oocytes. By birth, these primary oocytes enter prophase I of meiosis but become arrested in this stage, remaining suspended until puberty.
    Each primary oocyte is surrounded by a layer of pre-granulosa cells, forming what is known...
    Hormonal Control of the Ovarian Cycle01:30

    Hormonal Control of the Ovarian Cycle

    The ovarian cycle is meticulously regulated by the hypothalamic-pituitary-gonadal axis. This cycle orchestrates the release of a mature oocyte, essential for reproduction.
    Before puberty, the hypothalamus releases GnRH in a low frequency, low amplitude pulsatile manner. This along with the immature hypothalamic-pituitary-gonadal axis activity, results in low estrogen levels and the absence of a fully functional ovarian cycle.  At puberty, GnRH secretion increases in both frequency and...