Miscarriage identification and prediction from wearable-based physiological data

1. A method comprising:

acquiring, via one or more temperature sensors of a wearable ring device configured to be worn by a user that is pregnant, physiological data associated with the user;

receiving, via a transceiver of a user device and from the wearable ring device, the physiological data associated with the user, the physiological data comprising at least temperature data;

determining a time series of a plurality of temperature values taken over a plurality of days based at least in part on the received temperature data;

identifying that the plurality of temperature values are lower than a pregnancy baseline of temperature values for the user based at least in part on determining the time series;

identifying that one or more positive slopes of the plurality of temperature values are lower than a positive slope of the pregnancy baseline of temperature values for the user based at least in part on determining the time series;

detecting an indication of an early pregnancy loss of the user based at least in part on identifying that the plurality of temperature values are lower than the pregnancy baseline of temperature values for the user and based at least in part on identifying that the one or more positive slopes of the plurality of temperature values are lower than the positive slope for the pregnancy baseline of temperature values for the user; and

generating a message for display on a graphical user interface of the user device that indicates the indication of the early pregnancy loss.

2. The method of claim 1 , further comprising:

computing a deviation in the time series of the plurality of temperature values relative to the pregnancy baseline of temperature values for the user based at least in part on determining the time series, wherein the deviation comprises a decrease in the plurality of temperature values from the pregnancy baseline of temperature values for the user, wherein identifying that the plurality of temperature values are lower than the pregnancy baseline of temperature values is based at least in part on computing the deviation.

3. The method of claim 1 , wherein the physiological data further comprises heart rate data, the method further comprising:

acquiring the heart rate data via one or more light-emitting components and one or more light-receiving components of the wearable ring device; and

determining that the received heart rate data exceeds a pregnancy baseline heart rate for the user for at least a portion of the plurality of days, wherein detecting the indication of the early pregnancy loss is based at least in part on determining that the received heart rate data exceeds the pregnancy baseline heart rate for the user.

4. The method of claim 1 , wherein the physiological data further comprises heart rate variability data, the method further comprising:

acquiring the heart rate variability data via one or more light-emitting components and one or more light-receiving components of the wearable ring device; and

determining that the received heart rate variability data is less than a pregnancy baseline heart rate variability for the user for at least a portion of the plurality of days, wherein detecting the indication of the early pregnancy loss is based at least in part on determining that the received heart rate variability data is less than the pregnancy baseline heart rate variability.

5. The method of claim 1 , wherein the physiological data further comprises respiratory rate data, the method further comprising:

acquiring the respiratory rate data via one or more light-emitting components and one or more light-receiving components of the wearable ring device; and

determining that the received respiratory rate data exceeds a pregnancy baseline respiratory rate for the user for at least a portion of the plurality of days, wherein detecting the indication of the early pregnancy loss is based at least in part on determining that the received respiratory rate data exceeds the pregnancy baseline respiratory rate for the user.

6. The method of claim 1 , wherein the physiological data further comprises sleep data, the method further comprising:

acquiring the sleep data via one or more light-emitting components and one or more light-receiving components of the wearable ring device; and

determining that a quantity of detected sleep disturbances from the received sleep data exceeds a pregnancy baseline sleep disturbance threshold for the user for at least a portion of the plurality of days, wherein detecting the indication of the early pregnancy loss is based at least in part on determining that the quantity of detected sleep disturbances exceeds the pregnancy baseline sleep disturbance threshold for the user.

7. The method of claim 1 , further comprising:

identifying a presence of a menstrual cycle within a time period after pregnancy based at least in part on determining the time series, wherein detecting the indication of the early pregnancy loss is based at least in part on identifying the presence of the menstrual cycle.

8. The method of claim 1 , further comprising:

receiving a confirmation of a menstrual cycle within a time period after pregnancy, a confirmation of a pregnancy loss, or both, wherein detecting the indication of the early pregnancy loss is based at least in part on receiving the confirmation.

9. The method of claim 1 , further comprising:

determining each temperature value of the plurality of temperature values based at least in part on receiving the temperature data, wherein the temperature data comprises continuous nighttime temperature data.

10. The method of claim 1 , further comprising:

estimating a likelihood of future early pregnancy loss, a likelihood that the user will experience the early pregnancy loss, or both, based at least in part on identifying that the plurality of temperature values are lower than the pregnancy baseline of temperature values for the user, wherein detecting the indication of the early pregnancy loss is based at least in part on the estimation.

11. The method of claim 1 , further comprising:

identifying a false positive for identifying the indication of the early pregnancy loss based on a physiological measurement or a combination of physiological measurements.

12. The method of claim 1 , further comprising:

transmitting the message that indicates the indication of the early pregnancy loss to the user device, wherein the user device is associated with a clinician, the user, or both.

13. The method of claim 1 , further comprising: causing the graphical user interface of the user device associated with the user to display early pregnancy loss symptom tags based at least in part on detecting the indication of the early pregnancy loss.

14. The method of claim 1 , further comprising: causing the graphical user interface of the user device associated with the user to display a message associated with the indication of the early pregnancy loss.

15. The method of claim 14 , wherein the message further comprises a time interval during which the early pregnancy loss occurred, a time interval during which the early pregnancy loss is predicted to occur, a request to input symptoms associated with the early pregnancy loss, educational content associated with the early pregnancy loss, an adjusted set of sleep targets, an adjusted set of activity targets, recommendations to improve symptoms associated with the early pregnancy loss, or a combination thereof.

16. The method of claim 1 , further comprising:

inputting the physiological data into a machine learning classifier, wherein detecting the indication of the early pregnancy loss is based at least in part on inputting the physiological data into the machine learning classifier.

17. An apparatus, comprising:

a processor;

memory coupled with the processor, and

instructions stored in the memory and executable by the processor to cause the apparatus to:

acquire, via one or more temperature sensors of a wearable ring device configured to be worn by a user that is pregnant, physiological data associated with the user;

receive, via a transceiver of a user device and from the wearable ring device, the physiological data associated with the user, the physiological data comprising at least temperature data;

determine a time series of a plurality of temperature values taken over a plurality of days based at least in part on the received temperature data;

identify that the plurality of temperature values are lower than a pregnancy baseline of temperature values for the user based at least in part on determining the time series;

identify that one or more positive slopes of the plurality of temperature values are lower than a positive slope of the pregnancy baseline of temperature values for the user based at least in part on determining the time series;

detect an indication of an early pregnancy loss of the user based at least in part on identifying that the plurality of temperature values are lower than the pregnancy baseline of temperature values for the user and based at least in part on identifying that the one or more positive slopes of the plurality of temperature values are lower than the positive slope for the pregnancy baseline of temperature values for the user; and

generate a message for display on a graphical user interface of the user device that indicates the indication of the early pregnancy loss.

18. The apparatus of claim 17 , wherein the instructions are further executable by the processor to cause the apparatus to:

compute a deviation in the time series of the plurality of temperature values relative to the pregnancy baseline of temperature values for the user based at least in part on determining the time series, wherein the deviation comprises a decrease in the plurality of temperature values from the pregnancy baseline of temperature values for the user, wherein identifying that the plurality of temperature values are lower than the pregnancy baseline of temperature values is based at least in part on computing the deviation.

19. The apparatus of claim 17 , wherein the physiological data further comprises heart rate data, and wherein the instructions are further executable by the processor to cause the apparatus to:

acquire the heart rate data via one or more light-emitting components and one or more light-receiving components of the wearable ring device; and

determine that the received heart rate data exceeds a pregnancy baseline heart rate for the user for at least a portion of the plurality of days, wherein detecting the indication of the early pregnancy loss is based at least in part on determining that the received heart rate data exceeds the pregnancy baseline heart rate for the user.

20. A non-transitory computer-readable medium storing code, the code comprising instructions executable by a processor to:

acquire, via one or more temperature sensors of a wearable ring device configured to be worn by a user that is pregnant, physiological data associated with the user;

receive, via a transceiver of a user device and from the wearable ring device, the physiological data associated with the user, the physiological data comprising at least temperature data;

determine a time series of a plurality of temperature values taken over a plurality of days based at least in part on the received temperature data;

identify that the plurality of temperature values are lower than a pregnancy baseline of temperature values for the user based at least in part on determining the time series;

identifying that one or more positive slopes of the plurality of temperature values are lower than a positive slope of the pregnancy baseline of temperature values for the user based at least in part on determining the time series;

detect an indication of an early pregnancy loss of the user based at least in part on identifying that the plurality of temperature values are lower than the pregnancy baseline of temperature values for the user and based at least in part on identifying that the one or more positive slopes of the plurality of temperature values are lower than the positive slope for the pregnancy baseline of temperature values for the user; and

generate a message for display on a graphical user interface of the user device that indicates the indication of the early pregnancy loss.