Fetal heart rates
- PMID: 2664217
- DOI: 10.7863/jum.1989.8.7.407
Fetal heart rates
Comment on
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First trimester fetal cardiac activity. Sonographic documentation of a progressive early rise in heart rate.J Ultrasound Med. 1988 Oct;7(10):573-5. doi: 10.7863/jum.1988.7.10.573. J Ultrasound Med. 1988. PMID: 3066922
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