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Breastfeeding can increase time between births. Family planning, such as the use of contraceptives can increase inter-pregnancy interval. [4] Breastfeeding and extended breastfeeding can also increase birth spacing due to lactational amenorrhea. [5] [6] [7] [8]
The continuing of breastfeeding, while introducing solids after 6 months, to 12 months were shown to have an efficiency rate of 92.6 – 96.3 percent in pregnancy prevention. [13] Because of this some women find that breastfeeding interferes with fertility even after ovulation has resumed. The Seven Standards: Phase 1 of Ecological Breastfeeding
Gestational age: 3 weeks and 0 days until 3 weeks and 6 days old. 22–28 days from last menstruation. Embryonic age: Week nr 2. 1 week old. 8–14 days from fertilization.
"Access and Use of Contraception and Its Effects on Women's Outcomes in the U.S." (PDF). NBER Working Paper No. 23465. doi: 10.3386/w23465. S2CID 80536529. Coates, Patricia Walsh (2008), Margaret Sanger and the Origin of the Birth Control Movement, 1910–1930: The Concept of Women's Sexual Autonomy, Edwin Mellen Press, ISBN 978-0-7734-5099-8.
High levels of prolactin during pregnancy and breastfeeding also increase insulin resistance, increase growth factor levels (IGF-1) and modify lipid metabolism in preparation for breastfeeding. During lactation, prolactin is the main factor maintaining tight junctions of the ductal epithelium and regulating milk production through osmotic balance.
The term "conception" refers variably to either fertilization or to formation of the conceptus after its implantation in the uterus, and this terminology is controversial. The zygote will develop into a male if the egg is fertilized by a sperm that carries a Y chromosome, or a female if the sperm carries an X chromosome. [5]
Exclusive breastfeeding usually delays the return of fertility through lactational amenorrhea, [211] [212] although it does not provide reliable birth control. Breastfeeding may delay the return to fertility for some women by suppressing ovulation. Mothers may not ovulate, or have regular periods, during the entire lactation period. The non ...
The first 1,000 days of the human microbiome starting from time of conception until 2 years old is a critical time period for growth and development, including nutrients and microbiota. Proper nutrition is an essential to support healthy life; lack of nutrition may have a lifelong negative impact to the child's development. [ 3 ]
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