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4
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pregnant

3 5
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This week highlights

It's a date!

Our calculator can determine your due date based on the date of your last menstrual cycle or the date of conception.

The embryonic stage begins

其造成的影响范围比中国数据失真要小。英国法律要求英国国家统计局计算RPI数据,鉴于该部门拒绝改善算法,这种数据造假行为影响了继续与RPI挂钩的总值达数千亿英镑的合同。
《生活大爆炸》中绝不缺少天才。不只是因为这部剧向观众展示了很多绝顶聪明的科学家,同时,演员玛伊姆·比亚利克还拥有神经学博士学位。因此,演员们想要在剧中展示他们的聪明才智,并将整部剧做到精益求精,这也不足为奇。剧中谢尔顿和莱纳德的公寓里有一块很大的白板,这对铁哥们几乎在处理任何事时都会用到它,从完成从学校带回来的工作,到决定是否等到看完最新一部《蜘蛛侠》再吃饭,都离不开这块白板。

Consider carrier screening

It's a simple blood or saliva test to see whether your baby is at risk for any genetic disorders, such as cystic fibrosis or sickle cell disease.

36 weeks to go!

You're in your first month

Fetus icon

Baby development at 4 weeks

Your little embryo

你可以点击此处浏览全部的假新闻,这里列出的是排名前五的假新闻:
We will improve planning for regional development.
GDP reached 74.4 trillion yuan, representing 6.7-percent growth.
苹果推出了新一代iMac 电脑,1998年5月6日,旧金山

embryo made up of hypoblast and epiblast
Your baby at 4 weeks Tap the plus for more details
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Your baby is about the size of a poppy seed

poppy seed

Primitive placenta

读:炸-震动
最佳电影奖和最佳导演奖。让人意外的是,诺兰从未获得过奥斯卡奖最佳导演提名。
《三块广告牌》

embryo in uterus at 4 weeks
Your body at 4 weeks Tap the plus for more details

Amniotic sac and yolk sac

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In the past two decades, several campus poisoning incidents have sparked mass debates and concerns about students' psychological development and support.

See what fraternal twins look like in the womb this week.

Pregnancy symptoms during week 4

No symptoms?

Don't worry. Many women don't feel anything yet this week. In fact, most early pregnancy symptoms don't start until about 6 weeks.

Tender, swollen breasts

Breast tenderness can be one of the earliest signs of pregnancy. It usually starts around 4 to 6 weeks and lasts through the first trimester.

Fatigue

For many women, exhaustion is one of the first signs of pregnancy. But other women hardly seem to slow down at all.

Nausea or vomiting

Morning sickness can strike at any time of day. It usually starts around 6 weeks of pregnancy but can begin as early as 4 weeks. Some women have cramping as well.

智能家居症结待解 何时才能步入百姓家?

If you've been charting your temperature and it stays elevated for 18 days in a row, you're probably pregnant.

Pregnancy checklist at 4 weeks pregnant

Take a pregnancy test

If you haven't already, you should be able to find out whether you're pregnant. For the most accurate results, wait until a few days after you miss your period before you take a pregnancy test.

Make a prenatal appointment

If the test is positive, call your doctor or midwife and schedule your first prenatal appointment. In the meantime, you can calculate your due date, but remember that it's just an estimate. You're just as likely to go into labor any day during the two weeks before or after.

福建云霄成首个闽台LED照明技术示范县

If you've been trying to conceive with no success for a year or more (or for six months if you're over 35), talk to your healthcare provider about a workup for you and your partner to spot possible fertility problems.

4 weeks pregnant bellies

This week's video

Show sources

ACOG. 2015. FAQ156. Prenatal development: How your baby grows during pregnancy. American College of Obstetricians and Gynecologists. 一些最近发表的科学论文说,高空急流中这种持续较长的怪现象,由于全球变暖正在导致北极地区海洋中的冰迅速融化而变得更可能发生,但许多主要的科学家还没有被这种观点说服。 [Accessed May 2019]

FDA. 2014. Home Use Tests: Pregnancy. U.S. Food and Drug Administration. According to historical accounts, Richard's body was transported naked and bloody on the back of a pack horse to Leicester before being buried in an unmarked grave at Greyfriars, a Franciscan friary in the central English city. [Accessed May 2019]

March of Dimes. 2015. Prescription drugs, over-the-counter drugs, supplements and herbal products. 6. The 2012 Ig Nobel Prize for Literature [Accessed May 2019]

Mayo Clinic. 2015. Prenatal vitamins: Why they matter, how to choose. In the most significant change in methodology since this ranking was first published in 2005, the FT now collects information about alumni’s first jobs after graduation. These data are used in conjunction with information about their current jobs, three years later. This allows the FT to calculate their salary increase since graduation — a new ranking criterion — as well as their career progress (see methodology). [Accessed May 2019]

MedlinePlus (ADAM). 2015. Fetal development. 中国信息消费规模约5万亿元 同比增长超过11% [Accessed May 2019]

Kate Marple is an award-winning journalist with more than 25 years of experience writing and editing health content.   
 
 
 
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