# US 2019/0167236 A1 · Optical monitoring of facial characteristics during the menstrual cycle of a woman > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0167236 A1 - Document ID: US20190167236A1 - Status: Published application - Kind: A1 - Application number: 16/309,948 - Filed: 2017-06-01 - Published: 2019-06-06 - Earliest claimed: 2016-06-13 - Assignees: Koninklijke Philips N.V. - Applicants: Koninklijke Philips N.V. - Inventors: JOOST HUBERT MAAS; EMIEL PEETERS; SIMA ASVADI - Web page: https://patentgrep.com/patent/US20190167236A1 ## CPC - A61B 10/0012: {Ovulation-period determination (for animals A61D17/002)} - A61B 5/0013: {Medical image data (A61B1/00011, A61B6/56, A61B8/56 take precedence)} - A61B 5/01: Measuring temperature of body parts {; Diagnostic temperature sensing, e.g. for malignant or inflamed tissue} (clinical contact thermometers G01K13/20) - A61B 5/103: Measuring devices for testing the shape, pattern, {colour,} size or movement of the body or parts thereof, for diagnostic purposes (measuring instruments specially adapted for dentistry A61C19/04) - G06T 7/0014: {using an image reference approach} - G06V 40/15: {Biometric patterns based on physiological signals, e.g. heartbeat, blood flow} - G06V 40/172: {Classification, e.g. identification} - A61B 2010/0019: {based on measurement of temperature} - G06V 40/165: {using facial parts and geometric relationships} - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) - G06T: IMAGE DATA PROCESSING OR GENERATION, IN GENERAL - G06V: IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING ## Abstract In an embodiment, an apparatus (12) is presented that predicts a fertility window comprising a period of increased fecundability for a woman based on optical monitoring of facial features. ## Claims ### Claim 1 An apparatus, comprising: an image capture device configured to record plural images comprising facial features of a subject; memory comprising instructions; and a processor configured to execute the instructions to: receive data corresponding to the recorded plural images; determine from the data changes in the facial features; and predict a fertility window based on the determination, the fertility window comprising a period of time of increased fecundability for the subject. ### Claim 2 (depends on 1) The apparatus of claim 1, wherein the processor is configured to execute the instructions to determine from the data changes in skin tone. ### Claim 3 (depends on 1) The apparatus of claim 1, wherein the processor is configured to execute the instructions to determine from the data changes in symmetry of the facial features. ### Claim 4 (depends on 1) The apparatus of claim 1, wherein the processor is configured to execute the instructions to determine from the data changes in skin tone and changes in symmetry of the facial features. ### Claim 5 (depends on 1) The apparatus of claim 1, wherein the processor is further configured to execute the instructions to receive supplemental data corresponding to additional fertility prediction methods. ### Claim 6 (depends on 5) The apparatus of claim 5, wherein the processor is further configured to execute the instructions to receive the supplemental data comprising one or any combination of basal body temperature of the subject, luteinizing hormone levels in urine of the subject, data corresponding to electrolyte in saliva, and cervical mucus data of the subject. ### Claim 7 (depends on 5) The apparatus of claim 5, wherein the processor is further configured to execute the instructions to determine when there is a correlation between the supplemental data and the determined changes in the facial features, and based on the determination of when there is a correlation, adjust the period of time of the fertility window or improve a probability of the fertility window where the correlation corresponds to the period of time. ### Claim 8 (depends on 7) The apparatus of claim 7, wherein the processor is configured to execute the instructions to predict the fertility window based on the determination and the correlation. ### Claim 9 (depends on 1) The apparatus of claim 1, wherein the processor is configured to execute the instructions to determine from the data the changes in the facial features according to analysis of a predetermined set of facial features. ### Claim 10 A method, comprising: receiving plural images comprising facial features of a subject; receiving data corresponding to the plural images; determining from the data changes in the facial features; and predicting a fertility window based on the determination, the fertility window comprising a period of time of increased fecundability for the subject. ### Claim 11 (depends on 10) The method of claim 10, wherein determining from the data changes in the facial features comprises determining from the data one or a combination of changes in skin tone and changes in symmetry of the facial features. ### Claim 12 (depends on 10) The method of claim 10, further comprising receiving supplemental data corresponding to additional fertility prediction methods. ### Claim 13 (depends on 12) The method of claim 12, wherein receiving the supplemental data comprises receiving one or any combination of basal body temperature of the subject, luteinizing hormone levels in urine of the subject, and cervical mucus data of the subject. ### Claim 14 (depends on 13) The method of claim 13, further comprising determining when there is a correlation between the supplemental data and the determined changes in the facial features, and based on the determination of when there is a correlation, adjusting the period of time of the fertility window or improving a probability of the fertility window where the correlation corresponds to the period of time, wherein the fertility window is predicted based on the determination and the correlation. ### Claim 15 A non-transitory computer readable medium encoded with instructions executable by a processor that causes the processor to: receive plural images comprising facial features of a subject; receive data corresponding to the plural images; determine from the data changes in the facial features; and predict a fertility window based on the determination, the fertility window comprising a period of time of increased fecundability for the subject. ### Claim 16 (depends on 15) The non-transitory computer readable medium of claim 15, wherein the determine from the data changes in the facial features comprises determine from the data one or a combination of changes in skin tone and changes in symmetry of the facial features. ### Claim 17 (depends on 15) The non-transitory computer readable medium of claim 15, further comprising instructions executable by the processor that cause the processor to receive supplemental data corresponding to additional fertility prediction methods. ### Claim 18 (depends on 17) The non-transitory computer readable medium of claim 17, wherein receive the supplemental data further includes receive one or any combination of basal body temperature of the subject, luteinizing hormone levels in urine of the subject, and cervical mucus data of the subject. ### Claim 19 (depends on 18) The non-transitory computer readable medium of claim 18, further comprising instructions executable by the processor that cause the processor to determine when there is a correlation between the supplemental data and the determined changes in the facial features, and based on the determination of when there is a correlation, adjust the period of time of the fertility window or improving a probability of the fertility window where the correlation corresponds to the period of time, wherein the fertility window is predicted based on the determination and the correlation.