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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
Scientists have long investigated stem cells' potential for growing hearts, and they reached a major milestone this year when they created heart tissue than can beat on its own.
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
“FKA细枝”(FKA twigs)，《两星期》(Two Weeks)，Young Turks
The hair creates a resemblance to the look of Michelle Pfeiffer, but Ms. Chastain gives it more of an edge. Kay Georgiou, who frequently styles the hair of Matt Damon and Gwyneth Paltrow for films, oversaw the look.
Here are the 10 winners of the 2012 Ig Nobel Prizes given to scientists, writers, and peacemakers who make silly but thoughtful contributions to the world, or as the Annals of Improbable Research puts it, "first make people laugh, and then make them think." I can vouch for them making us laugh!
Amniotic sac and yolk sac
三个泡沫分别是：20世纪90年代初的亚洲泡沫，90年代晚期的互联网泡沫，以及在2008年引起华尔街崩盘的那次泡沫，朱克斯称之为“信贷大泡沫”(Great Big Credit Bubble)。
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. 8. Smart bottle opener [Accessed May 2019]
FDA. 2014. Home Use Tests: Pregnancy. U.S. Food and Drug Administration. INDOORS: This house was completed around 1848 and last updated in 2008. The front door has a transom and sidelights of red glass etched with a leaf motif. The first floor has a large living room with crown molding and two fireplaces, one of which warms the formal dining area. Off the living room is a family room with raised wall paneling, a wet bar and another dining area. French doors open to a slate patio. Several rooms have views of Little Narragansett Bay. [Accessed May 2019]
March of Dimes. 2015. Prescription drugs, over-the-counter drugs, supplements and herbal products. Seven schools made it back into the top 100 after having missed out in the past year or two. [Accessed May 2019]
Mayo Clinic. 2015. Prenatal vitamins: Why they matter, how to choose. 室内环境：这栋砖砌结构、灰泥粉饰并铺着瓷砖屋顶的两层楼房屋由Dorr & Dorr公司设计，于1916年完工，近15年内曾经翻修。该房屋采用了半牧场、半工匠艺术的设计风格，运用了简洁的线条、开敞式空间、典雅的木制品和彩色玻璃等设计。翻修工程由明尼阿波利斯市Sala建筑公司的约瑟夫·麦茨勒(Joseph Metzler)完成。 [Accessed May 2019]
MedlinePlus (ADAM). 2015. Fetal development. 欧普照明“基因式”升级 LED行业不破不立 [Accessed May 2019]