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	<title>ovulation &#8211; BIOENGINEER.ORG</title>
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		<title>Breath Signal at m/z 41.04 Rises During Ovulation in Small Pilot Study</title>
		<link>https://bioengineer.org/breath-signal-at-m-z-41-04-rises-during-ovulation-in-small-pilot-study/</link>
		
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		<pubDate>Sat, 24 Oct 2026 00:21:49 +0000</pubDate>
				<category><![CDATA[Health]]></category>
		<category><![CDATA[breath analysis]]></category>
		<category><![CDATA[estradiol]]></category>
		<category><![CDATA[isoprene]]></category>
		<category><![CDATA[luteinizing hormone]]></category>
		<category><![CDATA[mass spectrometry]]></category>
		<category><![CDATA[menstrual cycle]]></category>
		<category><![CDATA[ovulation]]></category>
		<category><![CDATA[Pilot Study]]></category>
		<category><![CDATA[Progesterone]]></category>
		<category><![CDATA[PTR-ToF-MS]]></category>
		<category><![CDATA[reproductive endocrinology]]></category>
		<category><![CDATA[volatile organic compounds]]></category>
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					<description><![CDATA[A pilot PTR-TOF–MS study of five healthy women found that the breath signal m/z 41.04 rose significantly during ovulation, while isoprene-related signals showed non-significant trends and no correlations with serum LH, estradiol, or progesterone, suggesting breath VOCs reflect integrated metabolic adaptations rather than direct hormone surrogates.]]></description>
		
		
		
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