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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

这枚奖牌拍出的高价远远超过了该拍卖行预计的成交金额——5万美元到10万美元。此前,仅有1903年诺贝尔和平奖奖牌在1985年被拍卖,拍得将近1.7万美元。
一,中国航空发动机集团的成立。去年集团公司通过研发提高了国产发动机的技术水平与续航能力,表明自主开发飞机发动机仍是当前中国的战略重点。当中国获得了铼,一种制造高压喷气发动机涡轮叶片的必须合金材料之后,这一决心更加显著。2010年在陕西发现占世界总储量7%的铼矿后,中国已投入相当大的精力开采并应用这一金属。此外,现代喷气发动机的关键部件——大规模单晶涡轮叶片制造技术也取得了重大突破。新成立的中俄宽体客机项目至此有望用上国产发动机。

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

From Yahoo’s bombshell announcement of a data breach that affected millions, to the recent WannaCry and BadRabbit ransomware attacks, 2017 has brought several major cybersecurity disasters.
欧洲出现了债务危机。日本面临自然灾害。曾经是全球亮点的新兴市场也失去了光芒。近来意大利、埃及和泰国等国频现政治危机,这或许表明全球市场可能将出现新一轮动荡。
I said it last year - and I'll say it again. There is only one activity more thankless than predicting the future - and that is publicly sharing your predictions.
In an emailed statement, FIFA said that during group stage matches, it sold a total of 143,364 of the cheapest tickets, which amounted to roughly 3,000 such tickets available per match.

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

Founded in the 5th century and covering 118 small islands, the Northeast Italian city is famed for its water views, architecture and artwork.
WHAT: A Greek Revival with four bedrooms and four and a half bathrooms
游戏平台:Xbox One、Xbox 360、PS4、PS3 、PC

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

Amniotic sac and yolk sac

Moving away from fossil fuels to renewable energy is surely the most important engineering and scientific challenge of our age.
Stock pickers encountered difficulty this year in part because of concentration at the top of the market. Just five stocks—Apple, Berkshire Hathaway, Johnson & Johnson, Microsoft, and Intel— accounted for 20% of the market’s gains. If you weren’t at least equally weighted toward them, you had virtually no shot at making up for missing their enormous, index-driving gains. A majority of the market’s stocks did not perform nearly as well. According to the Leuthold Group, only 30% of S&P 1500 stocks posted gains exceeding the index itself. You’d have to go back to 1999 to see anything like this.

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.

深圳深入推进住宅区垃圾分类

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.

二线城市抢人大战再升级:落户降学历 买房降首付

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. [p?n'demik] [Accessed May 2019]

FDA. 2014. Home Use Tests: Pregnancy. U.S. Food and Drug Administration. 彭希哲解释称,中部和西部城市化的推进,也吸引了东部沿海城市向内陆地区的大量劳动力前往花销更低的内陆地区。 [Accessed May 2019]

March of Dimes. 2015. Prescription drugs, over-the-counter drugs, supplements and herbal products. “现在,我只给她稍微擦了点唇膏,涂了点指甲油。” [Accessed May 2019]

Mayo Clinic. 2015. Prenatal vitamins: Why they matter, how to choose. The collaboration with business is important, adds Teach First, not just for the funding but to help schools equip students with more of the skills required by modern employers. [Accessed May 2019]

MedlinePlus (ADAM). 2015. Fetal development. 房企掘金存量房谋求通吃上下游 物业和装修机遇凸显 [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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