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    Week 4

    fetal development

    Hotspot: 410,710

    A missed period is usually the first sign that you're pregnant.

    Hotspot: 525,140

    Hormonal changes may make your breasts feel tender and swollen.

    Hotspot: 400,535

    By the end of this week, a home pregnancy test may be positive.

    Hotspot: 530,350

    Changing hormone levels cause many of your pregnancy symptoms.

    WebMD Medical Reference

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