Definition of lactation in English:



  • 1[mass noun] The secretion of milk by the mammary glands.

    • ‘Remarkably, the females give birth at this time of year; nursing sifaka mothers produce very dilute milk and thus lose significant amounts of water during lactation.’
    • ‘As lactation continues it turns pink because it's very high in iron, and then later in lactation the milk is so thick it's almost like the thickest cream and you cannot even get it up in a pipette.’
    • ‘Mammary glands during lactation were excised from two swh/swh and two swh / + females on the day of their delivery.’
    • ‘Fluctuating hormone levels, particularly during puberty or menopause, may also cause lactation.’
    • ‘These gaps close by the second week of lactation.’
    • ‘Consider, for example, dairy cows with first and second lactation milk yield records.’
    • ‘Such features may vary according to whether the patient was pregnant, lactating, or had recently terminated her pregnancy or lactation at the time of surgical excision.’
    • ‘From here it was an easy step for early modern suspicion to extend to all female bodily fluids: tears, menstruation, lactation.’
    • ‘To induce lactation, the milk ducts of the breasts must be stimulated.’
    • ‘James's breed leader was the home bred second calver Winton Gibson Pamela which produced 9,000 litres of milk in her last lactation.’
    • ‘Nutrition plays a major role in pregnancy and lactation.’
    • ‘Their projections of lactation capability are often based on the assumption that any lactation is full lactation; that is, if a woman has any milk at all, she has a full milk supply.’
    • ‘Domperidone may increase the secretion of prolactin, a hormone that is needed for lactation.’
    • ‘Adoptive mothers should be counseled on the benefits of induced lactation through hormonal therapy or mechanical stimulation.’
    • ‘The period that she produces milk for them is called lactation.’
    • ‘Although milk production decreased during early lactation, PPI and pregnancy rate were not influenced by treatment.’
    • ‘And probably that reflects the fact that these women, if they are good at long time lactating, probably will eat more to keep that lactation going.’
    • ‘The pregnant woman accumulates fat during pregnancy to guarantee fetal development and lactation.’
    • ‘Whether we measure bushels of grain per acre for row crops, pounds of gain per day for livestock, or liters of milk per lactation for dairy cows, innovation in agriculture has been dramatic.’
    • ‘Reduced DMI impacts the amount and duration of negative energy balance in early lactation, subsequent milk production and reproduction, and economic value.’
    1. 1.1The action of suckling an infant.
      • ‘Clear contraindications to androgen therapy include pregnancy, lactation, signs of hyperandrogenemia, and presence of androgen-dependent tumors.’
      • ‘The nutrient content of expressed breast milk varies depending on the stage of lactation at which it is collected.’
      • ‘Our data support the hypothesis that bone lead may be mobilized during pregnancy and lactation.’
      • ‘Breeding seasons of both species began with male testes developing in winter and spring, followed by female pregnancy and lactation in late spring and summer.’
      • ‘Major demands are placed on the mother by the fetus for calcium during pregnancy and by the infant during lactation.’
      • ‘Because of feeding difficulties, the mothers of these infants may benefit from lactation consultation and occupational therapy.’
      • ‘Nutritional rickets at this age is not uncommon in areas where maternal intake of vitamin D and calcium during pregnancy and lactation is very low.’
      • ‘Exclusion criteria included any current use of weight-loss or lipid-lowering medications, and type II diabetes, pregnancy, or lactation.’
      • ‘Studies of captive lorises have shown that after a female has given birth, the demands of lactation and raising an infant may keep her from mating again for ten to fourteen months.’
      • ‘However, none of the 5 tumors presenting during pregnancy and lactation that were tested were positive for either protein.’
      • ‘Pregnancy and lactation are considered the only absolute contraindications.’
      • ‘Contraindications to sentinel node biopsy include a clinically positive axillary node, prior axillary surgery, pregnancy, or lactation.’
      • ‘Safety during pregnancy and lactation is less extensively documented than in Herb Contraindications and Drug Interactions.’
      • ‘Doxycycline is relatively contraindicated during pregnancy or lactation and for children younger than eight years.’
      • ‘It may or may not re-accumulate during the 2nd pregnancy and lactation.’
      • ‘Guidelines for the evaluation of nonpuerperal galactorrhea should also include inquiry about previous pregnancy or lactation.’
      • ‘Because it contains noninfectious hepatitis B surface antigen particles and should cause no risk to the fetus, neither pregnancy nor lactation is a contraindication to vaccination.’
      • ‘One group drank a lot of carrot juice during the last trimester of pregnancy, the other group drank the carrot juice during lactation, and then we had a control group.’
      • ‘When a mother or an infant is hospitalized, lactation should be continued if possible.’
      • ‘Although the use of antidepressant medications during pregnancy and lactation is generally discouraged, new findings indicate that drastic measures to cease treatment may do more harm than good.’


Mid 17th century: from Latin lactatio(n-), from lactare suckle, from lac, lact- milk.