Week 39enparentshttps://kidshealth.org/EN/images/headers/P_PregCal_Wk39_enHD.jpgBraxton Hicks contractions (also called "false labor") may become more pronounced, and your water may break.umbilical cord, placenta, pregnancy, pregnancy calendar, amniotic sac, water breaking, true labor, labor pains, contraction, water broke, rupture membranes03/09/200108/10/201808/10/201825985341-0df8-4e21-bb36-fdf44f6ca27dhttps://kidshealth.org/ws/RadyChildrens/en/parents/week39.html/<h3>Your Baby's Development</h3> <p><span style="font-size: 1em; line-height: 1.4em;">Umbilical cords usually are about 22 inches (55 cm) long and half an inch (1&ndash;2 cm) thick. Sometimes, the cord can get wrapped around a baby's neck. This usually won't be a problem unless</span>&nbsp;it puts pressure on the cord during labor or delivery. In that case,&nbsp;<span style="font-size: 1em;">a woman might need a C-section. A true knot in the umbilical cord happens much less often (in about 1% of pregnancies).</span></p> <p><a href="https://kidshealth.org/ws/RadyChildrens/en/parents/babyslideshow.html/"><img class="right" title="Watch Your Baby Grow" src="https://kidshealth.org/EN/images/promos/PregCal-BabyGrow-enPR.jpg" alt="Watch Your Baby Grow" /></a>Most of the vernix that covered your baby's skin has disappeared, as has the lanugo. Your body has been supplying the baby with antibodies through the placenta that will help your little one's immune system fight infection for the first 6&ndash;12 months of life.</p> <p><img class="left" title="Week 39" src="https://kidshealth.org/EN/images/galleries/PregCal-Week39-enGL.jpg" alt="Week 39" /></p> <p>&nbsp;</p> <h3>Your Body</h3> <p><a href="https://kidshealth.org/ws/RadyChildrens/en/parents/momandbaby-slideshow.html/"><img class="right" title="" src="https://kidshealth.org/EN/images/buttons/PregnancySlideshow-Belly-enBT-1.png" alt="Watch your belly grow!" /></a>Braxton Hicks contractions may become more pronounced. Also called "false labor," these contractions may be as painful and strong as <a href="https://kidshealth.org/ws/RadyChildrens/en/parents/true-labor.html/">true labor</a> contractions, but don't become regular or increase in frequency as true contractions do.</p> <p>Another sign of labor, the rupture of the amniotic sac's<span style="font-size: 1em;">&nbsp;membranes (when your "water breaks"), could happen any day now. Some women have a large gush of water, while others feel a steady trickle. Often, a woman's water doesn't break until she's well into labor.&nbsp;</span><span style="font-size: 1em;">To start or speed up their labor, some women will need to have the membranes ruptured by their health care provider. </span></p> <p><span style="font-size: 1em;">If you think your water has broken or you're having regular contractions, call your health care provider.</span></p> <p> <script src="//familysurvey.org/misc/javascript/js_apps/pregnancy-calendar/kh-pregnancy-calendar-final.js" type="text/javascript"></script> </p> <div class="kh-pregnancy-calendar"> <div class="kh-pregnancy-calendar-topbar">PREGNANCY CALENDAR: <strong>A week-by-week guide</strong></div> <div class="kh-pregnancy-calendar-inner-container"> <div class="kh-pregnancy-calendar-topnav"><!-- ensure that the week value for Previous is 1 less than khPregnancyDay and that next is 1 more e.g. for week 3, Previous will be week 2 and Next will be week 4 --> <div class="kh-pregnancy-calendar-prev-active"><a href="https://kidshealth.org/ws/RadyChildrens/en/parents/week38.html/">Previous</a></div> <div class="kh-pregnancy-calendar-next-active"><a href="https://kidshealth.org/ws/RadyChildrens/en/parents/week40.html/">Next</a></div> </div> <ul> <li class="kh-pregnancy-calendar-days-t1"><a id="khpcd1" href="https://kidshealth.org/ws/RadyChildrens/en/parents/week1.html/">1</a></li> <li class="kh-pregnancy-calendar-days-t1"><a id="khpcd2" href="https://kidshealth.org/ws/RadyChildrens/en/parents/week2.html/">2</a></li> <li class="kh-pregnancy-calendar-days-t1"><a id="khpcd3" href="https://kidshealth.org/ws/RadyChildrens/en/parents/week3.html/">3</a></li> <li class="kh-pregnancy-calendar-days-t1"><a id="khpcd4" href="https://kidshealth.org/ws/RadyChildrens/en/parents/week4.html/">4</a></li> <li class="kh-pregnancy-calendar-days-t1"><a id="khpcd5" href="https://kidshealth.org/ws/RadyChildrens/en/parents/week5.html/">5</a></li> <li class="kh-pregnancy-calendar-days-t1"><a id="khpcd6" href="https://kidshealth.org/ws/RadyChildrens/en/parents/week6.html/">6</a></li> <li class="kh-pregnancy-calendar-days-t1"><a id="khpcd7" href="https://kidshealth.org/ws/RadyChildrens/en/parents/week7.html/">7</a></li> <li class="kh-pregnancy-calendar-days-t1"><a id="khpcd8" href="https://kidshealth.org/ws/RadyChildrens/en/parents/week8.html/">8</a></li> <li class="kh-pregnancy-calendar-days-t1"><a id="khpcd9" href="https://kidshealth.org/ws/RadyChildrens/en/parents/week9.html/">9</a></li> <li class="kh-pregnancy-calendar-days-t1"><a id="khpcd10" href="https://kidshealth.org/ws/RadyChildrens/en/parents/week10.html/">10</a></li> <li class="kh-pregnancy-calendar-days-t1"><a id="khpcd11" href="https://kidshealth.org/ws/RadyChildrens/en/parents/week11.html/">11</a></li> <li class="kh-pregnancy-calendar-days-t1"><a id="khpcd12" href="https://kidshealth.org/ws/RadyChildrens/en/parents/week12.html/">12</a></li> <li class="kh-pregnancy-calendar-days-t2"><a id="khpcd13" href="https://kidshealth.org/ws/RadyChildrens/en/parents/week13.html/">13</a></li> <li class="kh-pregnancy-calendar-days-t2"><a id="khpcd14" href="https://kidshealth.org/ws/RadyChildrens/en/parents/week14.html/">14</a></li> <li class="kh-pregnancy-calendar-days-t2"><a id="khpcd15" href="https://kidshealth.org/ws/RadyChildrens/en/parents/week15.html/">15</a></li> <li class="kh-pregnancy-calendar-days-t2"><a id="khpcd16" href="https://kidshealth.org/ws/RadyChildrens/en/parents/week16.html/">16</a></li> <li class="kh-pregnancy-calendar-days-t2"><a id="khpcd17" href="https://kidshealth.org/ws/RadyChildrens/en/parents/week17.html/">17</a></li> <li class="kh-pregnancy-calendar-days-t2"><a id="khpcd18" href="https://kidshealth.org/ws/RadyChildrens/en/parents/week18.html/">18</a></li> <li class="kh-pregnancy-calendar-days-t2"><a id="khpcd19" href="https://kidshealth.org/ws/RadyChildrens/en/parents/week19.html/">19</a></li> <li class="kh-pregnancy-calendar-days-t2"><a id="khpcd20" href="https://kidshealth.org/ws/RadyChildrens/en/parents/week20.html/">20</a></li> <li class="kh-pregnancy-calendar-days-t2"><a id="khpcd21" href="https://kidshealth.org/ws/RadyChildrens/en/parents/week21.html/">21</a></li> <li class="kh-pregnancy-calendar-days-t2"><a id="khpcd22" href="https://kidshealth.org/ws/RadyChildrens/en/parents/week22.html/">22</a></li> <li class="kh-pregnancy-calendar-days-t2"><a id="khpcd23" href="https://kidshealth.org/ws/RadyChildrens/en/parents/week23.html/">23</a></li> <li class="kh-pregnancy-calendar-days-t2"><a id="khpcd24" href="https://kidshealth.org/ws/RadyChildrens/en/parents/week24.html/">24</a></li> <li class="kh-pregnancy-calendar-days-t2"><a id="khpcd25" href="https://kidshealth.org/ws/RadyChildrens/en/parents/week25.html/">25</a></li> <li class="kh-pregnancy-calendar-days-t2"><a id="khpcd26" href="https://kidshealth.org/ws/RadyChildrens/en/parents/week26.html/">26</a></li> <li class="kh-pregnancy-calendar-days-t3"><a id="khpcd27" href="https://kidshealth.org/ws/RadyChildrens/en/parents/week27.html/">27</a></li> <li class="kh-pregnancy-calendar-days-t3"><a id="khpcd28" href="https://kidshealth.org/ws/RadyChildrens/en/parents/week28.html/">28</a></li> <li class="kh-pregnancy-calendar-days-t3"><a id="khpcd29" href="https://kidshealth.org/ws/RadyChildrens/en/parents/week29.html/">29</a></li> <li class="kh-pregnancy-calendar-days-t3"><a id="khpcd30" href="https://kidshealth.org/ws/RadyChildrens/en/parents/week30.html/">30</a></li> <li class="kh-pregnancy-calendar-days-t3"><a id="khpcd31" href="https://kidshealth.org/ws/RadyChildrens/en/parents/week31.html/">31</a></li> <li class="kh-pregnancy-calendar-days-t3"><a id="khpcd32" href="https://kidshealth.org/ws/RadyChildrens/en/parents/week32.html/">32</a></li> <li class="kh-pregnancy-calendar-days-t3"><a id="khpcd33" href="https://kidshealth.org/ws/RadyChildrens/en/parents/week33.html/">33</a></li> <li class="kh-pregnancy-calendar-days-t3"><a id="khpcd34" href="https://kidshealth.org/ws/RadyChildrens/en/parents/week34.html/">34</a></li> <li class="kh-pregnancy-calendar-days-t3"><a id="khpcd35" href="https://kidshealth.org/ws/RadyChildrens/en/parents/week35.html/">35</a></li> <li class="kh-pregnancy-calendar-days-t3"><a id="khpcd36" href="https://kidshealth.org/ws/RadyChildrens/en/parents/week36.html/">36</a></li> <li class="kh-pregnancy-calendar-days-t3"><a id="khpcd37" href="https://kidshealth.org/ws/RadyChildrens/en/parents/week37.html/">37</a></li> <li class="kh-pregnancy-calendar-days-t3"><a id="khpcd38" href="https://kidshealth.org/ws/RadyChildrens/en/parents/week38.html/">38</a></li> <li class="kh-pregnancy-calendar-days-t3"><a id="khpcd39" href="https://kidshealth.org/ws/RadyChildrens/en/parents/week39.html/" class="kh-pregnancy-calendar-days-active">39</a></li> <li class="kh-pregnancy-calendar-days-t3"><a id="khpcd40" href="https://kidshealth.org/ws/RadyChildrens/en/parents/week40.html/">40</a></li> </ul> <div class="kh-pregnancy-calendar-trimesters"> <ul> <li class="kh-pregnancy-calendar-t1">Trimester 1</li> <li class="kh-pregnancy-calendar-t2">Trimester 2</li> <li class="kh-pregnancy-calendar-t3">Trimester 3</li> </ul> </div> </div> </div>Semana 39Semana 39https://kidshealth.org/ws/RadyChildrens/es/parents/week39-esp.html/3f74bf63-3038-4079-b9a9-9c81dd486571kh:age-NAkh:clinicalDesignation-obgynkh:genre-toolkh:primaryClinicalDesignation-obgynCalendarhttps://kidshealth.org/ws/RadyChildrens/en/parents/pregnancy-center/pregnancy-calendar/5cf1d7f8-bd89-4e41-8fd9-23b431df98c0https://kidshealth.org/EN/images/promos/PregCal-BabyGrow-enPR.jpghttps://kidshealth.org/EN/images/galleries/PregCal-Week39-enGL.jpghttps://kidshealth.org/EN/images/buttons/PregnancySlideshow-Belly-enBT-1.png