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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
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
乔布斯在苹果全球研发者大会上手持iPhone 4 ，2010年6月7日，旧金山
Ferreira added that while the entire Brazilian population has suffered during preparations for the World Cup, mostly because of big construction projects that have snarled traffic and extended already long commutes for the poor who live on the outskirts of cities, she feels like only the rich are reaping the benefits of the real World Cup experience.
这间增加的厨房大约40英尺长(约12米)，风格与原建筑保持一致，内有复杂的天花板木制结构和几处由世纪工作室(Century Studios)设计的彩色玻璃板，该工作室是明尼阿波利斯市的一家公司，其玻璃确保来自弗兰克·劳埃德·赖特(Frank Lloyd Wright)曾指定的那家芝加哥制造商。厨房里的不锈钢电器包括一台五英尺宽（约1.5米）的炉灶和一台Sub-zero的冰箱。餐厅区经由10英尺高（约3米）的玻璃门通往屋后的一处露台。
The annual national civil service exam kicked off last Sunday, and some recent hot topics - such as college graduates starting their own businesses and the Yutu (Jade Rabbit) lunar rover - appeared in the exam questions.
Amniotic sac and yolk sac
在针对已拥有金融业工作经验的学员开设的金融课程的排行榜上，伦敦商学院(London Business School)重新夺回在2011年至2015年占据的冠军宝座，同时英国剑桥大学(University of Cambridge)佳奇管理学院(Judge Business School)跌回第二名。
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. Gitanjali Rao was selected from 10 finalists who had spent three months collaborating with scientists to develop their ideas. [Accessed May 2019]
FDA. 2014. Home Use Tests: Pregnancy. U.S. Food and Drug Administration. 关注规模较小和私营制造企业的财新制造业PMI下降，而主要关注规模较大和国有企业的官方制造业PMI指数同期出现上升。这种分歧可能表明，比起规模较大和国营的企业，较小的企业受污染限制和其他监管收紧的冲击更为严重。前者还享受国有银行的优惠待遇。 [Accessed May 2019]
March of Dimes. 2015. Prescription drugs, over-the-counter drugs, supplements and herbal products. Video footage recorded by the RSPCA shows the house littered with mess, including animal faeces. [Accessed May 2019]
Mayo Clinic. 2015. Prenatal vitamins: Why they matter, how to choose. It is estimated that over 89m enterprise retirees and more than 17m institution retirees will benefit from the adjustment. [Accessed May 2019]
MedlinePlus (ADAM). 2015. Fetal development. 11月 土地市场新规则问世 [Accessed May 2019]