summarize this source.What is the thesis of this article?  Stephenson, Judith, et al. "Before the Beginning: Nutrition and Lifestyle in the Preconception Period and its Importance for Future Health." The Lancet, vol. 391, no. 10132, 2018, pp. 1830-1841. ProQuest, https://libproxy.howardcc.edu/login?url=https://www.proquest.com/scholarly-journals/before-beginning-nutrition-lifestyle/docview/2034228794/se-2, doi:https://doi.org/10.1016/S0140-6736(18)30311-8.

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Hematology

Hematology is the branch of biology. Hematology is the medical field that deals with the treatment of blood disorders and cancers, such as hemophilia, leukemia, lymphoma, and sickle-cell anemia. Hematologists and hematopathologists are medical professionals who specialize in illnesses of the blood and its components.