HTTP/1.1 200 OK Cache-Control: no-cache, private Content-Type: text/html; charset=UTF-8 Date: Wed, 25 Nov 2020 22:27:49 GMT 副利社视频试看30秒

4
weeks
pregnant

3 5
lightbulb icon

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

这块白板经常被写满公式。但你是否曾好奇过这些公式都有什么含义?我们也许没有机会知道它们代表什么,但它们的确都是真实准确的公式。这一点相当给力。
transportation

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

His eloquent defence of equality came after a year of faltering progress on gay marriage in the US and as arguments rage about the lack of diversity among the people running the Silicon Valley companies, including Apple, who shape so much of our culture.
同时,只有三部好莱坞大片成功挤进2015年中国电影票房销售额的前十名。它们分别是《速度与激情7》、《复仇者联盟:奥创纪元》以及《侏罗纪世界》。
不过无需置疑,软件的收购同时意味着“人才的收购”,雅虎买下的不只是产品,还有产品背后的人。达洛伊西奥如今已是雅虎伦敦分部的全职员工,而他的青春活力以及无可厚非的独特潜质给这个曾经腐朽老旧的科技巨头注入了迫切需要的新鲜活力。雅虎CEO玛丽莎?梅耶尔赞赏他“力求设计的完美和产品的简约”,并称自己“被他的创造活力和坚韧精神所感染”。
n. 身份,一致,特征

embryo made up of hypoblast and epiblast
Your baby at 4 weeks Tap the plus for more details
advertisement | page continues below
calendar icon

Your baby is about the size of a poppy seed

poppy seed

Primitive placenta

这张专辑等于是一次直截了当的暗示,提醒着我们,不论什么时候,只要霉女王想要,她就能拿回自己在流行音乐界的领先地位。
[strein]
It came as no surprise that the likes of Emily Ratajkowski, Adriana Lima, Lily Donaldson and Petra Nemcova turned out to be the red carpet rulers on day one of the 70th Cannes Film Festival.

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

Amniotic sac and yolk sac

“我们一直用很高的标准要求自己”,库里赛后表示。“我们在第三节没有给他们防守端施加压力,草率地结束了我们的进攻并且给了他们机会。有很多需要我们继续提高的地方,当然,每个人都愿意在赢球的同时接受教训。”
德布勒森是继首都布达佩斯之后的第二大城市,也是消费水平较低的匈牙利的中心地带。

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.

2015上半年家居建材企业的奔跑行程记录

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.

2015中国家具行业十大营销事件

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. vt. 凌辱,激怒 [Accessed May 2019]

FDA. 2014. Home Use Tests: Pregnancy. U.S. Food and Drug Administration. “能被评为全球最国际化的大学之一,这个名单中的所有学校都是值得祝贺的。这标志着它们拥有巨大的潜力、竞争力和发展动力。” [Accessed May 2019]

March of Dimes. 2015. Prescription drugs, over-the-counter drugs, supplements and herbal products. 在你学习的时候,你要留意会考到的内容,并快速写下实践问题。在笔记本电脑上新建一个文件夹,并将你的问题添加进去。 [Accessed May 2019]

Mayo Clinic. 2015. Prenatal vitamins: Why they matter, how to choose. Sinta Nuriyah carries forth her family’s campaign in Indonesia, holding interfaith events and establishing a network of progressive Islamic boarding schools for girls. [Accessed May 2019]

MedlinePlus (ADAM). 2015. Fetal development. 杭州古建筑试点电气火灾智能“防火墙” [Accessed May 2019]

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

How many positive pregnancy tests did you need before you believed the news?

One
Two
Three or more
Other
advertisement
advertisement
Log in to continue

baby growth animation
Get the BabyCenter app
The #1 app for tracking pregnancy and baby growth.
Download now