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4
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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

节目19 歌曲《一辈子朋友》,杨坤 张靓颖
Format: Five residential periods with online learning in between

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

斯坦福大学的Zhenan Baohas 研发出了一种具备超弹性、超耐性和超敏感的材料,能够作为未来发展人工皮肤的基础。以前,人们也研究过生化皮肤,但是Baohas的材料比以前研发出来的更具敏感性。它带有有机转换物质和一层弹性材料,保证它在不被破坏情况下的延展性。另外,这种材料带有一系列的太阳能电池元件,可以自动充电。
另一种看法是,油价在过去三年中的变动,是长期结构性变化的开始,预示着下一个50年里,能源价格按实际值计算将显著低于上一个50年。简单地说,持这种看法的人认为,供给的增长潜力超过需求增长。
Statistics show global research and development expenditure grew at an annual pace of approximately seven percent before 2009, but slowed down to four percent in 2014
adj. 疲劳的

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

6. 米兰达?可儿
在对入围的六本图书展开激烈辩论时,一名评委形容福特的书对该问题做出了“冷静而全面”的分析。英国《金融时报》主编兼此次评选委员会主席莱昂内尔巴伯(Lionel Barber)称《机器人的崛起:大规模失业的威胁与科技》“行文紧凑、研究深入,是公共政策辩论领域的又一佳作。”
这个位于非洲西南部的国家拥有20多家国家公园以及世界上最古老的沙漠。

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

Amniotic sac and yolk sac

In a sign that civil service jobs may be losing their appeal, a report issued by recruitment website Zhaopin in late March said more than 10,000 public sector employees, including civil servants and staff members at public institutions, had submitted their resumes to potential employers through the site in just two months. The number was 34 percent higher during the same period last year, the report said.
n. 火焰,热情

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.

国家统计局:3月CPI同比增长2.3% 居住价格同比上涨2.1%

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.

汪涛:房地产市场面临再次调整 将拖累经济增长

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. You can browse the full list at AskMen.com. Here are the top 10 women: [Accessed May 2019]

FDA. 2014. Home Use Tests: Pregnancy. U.S. Food and Drug Administration. "The average salary level of employees grew by about 6.3 percent year on year in the first three quarters of last year, while China's annual GDP growth stood at 6.7 percent in 2016, both slowing from a year earlier," Jin added. [Accessed May 2019]

March of Dimes. 2015. Prescription drugs, over-the-counter drugs, supplements and herbal products. 据《泰晤士报》高等教育星期四公布的最新排名,中国的两所大学--香港大学和澳门大学,跻身2016全球大学国际化水平前十名。 [Accessed May 2019]

Mayo Clinic. 2015. Prenatal vitamins: Why they matter, how to choose. And, thanks to Artnet and other databases that list auction results, wealthy people who buy art have become all too aware of how hard it is to make a profit on old masters. [Accessed May 2019]

MedlinePlus (ADAM). 2015. Fetal development. 东莞:12个镇街销售均价超20000元/平方米 [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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