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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
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。
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
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.
See what fraternal twins look like in the womb this week.
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.
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.
If you've been charting your temperature and it stays elevated for 18 days in a row, you're probably 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.
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.
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]