第 5 週：微小心臟開始跳動
您的寶寶現在大約像 一顆芝麻.
平均身長: 0.2 公分
(頭臀長)
本週您的寶寶
令人難以置信的是，寶寶微小的心管正在形成並開始跳動！寶寶現在只有芝麻大小，胚胎已有三層細胞，正在為所有器官奠定基礎。神經管（將發育為大腦和脊髓）正在迅速發育。原始的臍帶也正在成型。
本週您的身體
月經沒來是一個大線索，現在體內的 hCG 水平通常足以讓驗孕棒顯示陽性了！面對這個消息，感到興奮和焦慮都有可能。如果您感到擔心，不要猶豫，與您的醫生分享感受。您可能也會開始感到身體不適，早孕反應開始顯現。
給伴侶的提示
現在是正式的「準爸爸」了，給她滿滿的支持吧！主動陪她去第一次產檢。醫師通常建議孕婦避免清理貓砂以防弓形蟲感染，所以這是一個讓伴侶接手的好雜事。
References
[1]
Fetal Development: Week-by-Week Stages of Pregnancy - Cleveland Clinichttps://my.clevelandclinic.org/health/articles/7247-fetal-development-stages-of-growth
[2]
Fetal development: The first trimester - Mayo Clinichttps://www.mayoclinic.org/healthy-lifestyle/pregnancy-week-by-week/in-depth/prenatal-care/art-20045302#:~:text=The%20embryo%20is%20now%20made,lungs%20and%20intestines%20will%20develop
[3]
The umbilical cord: a rich and ethical stem cell source to advance regenerative medicine - NIHhttps://pmc.ncbi.nlm.nih.gov/articles/PMC6495455/#:~:text=From%20the%20third%20week%20of,shape%20of%20an%20umbilical%20ring
[4]
5 Weeks Pregnant: Baby Development, Symptoms & Signs - What To Expecthttps://www.whattoexpect.com/pregnancy/week-by-week/week-5.aspx#:~:text=It's%20time%20to%20pee%20on,by%20a%20home%20pregnancy%20test
[5]
Week 5 Pregnancy: Your Baby's Heart Starts To Beat - Thomson Medicalhttps://www.thomsonmedical.com/blog/week-5-pregnancy
[6]
Mayo Clinic Minute: Pregnancy and toxoplasmosis - Mayo Clinichttps://newsnetwork.mayoclinic.org/discussion/mayo-clinic-minute-pregnancy-and-toxoplasmosis/