Menstrual Period: the Google Health API menstrual-period data type
Read from Google’s documentation on 2026-10-17 · discovery document revision 20261014 · Google’s data-types page last updated 2026-10-06
Menstrual Period (menstrual-period) is an Interval data type in the Google Health API. Google's data-types table lists create, update and batchDelete for it under the .reproductive_health.writeonly scope. The table marks it with neither webhook nor true-zeros support. Google's Fitbit migration table names no Fitbit Web API predecessor for it.
Menstrual Period at a glance
From the Menstrual Period row of Google’s data-types table, joined to the discovery document’s DataPoint schema.
- Display name
- Menstrual Period
- dataType (in endpoint URLs)
menstrual-period- filter parameter
menstrual_periodGoogle: “The identifier separated by underscores (for example,active_minutes) used as the value for thedataTypefilter parameter in daily rollup and rollup requests.”- Record type
- Interval — Google: “Represents measurements recorded over a duration.”
- Storage resolution
- not stated in Google’s table
- Webhook support
- Not marked in Google’s table
- True zeros support
- Not marked in Google’s table
- Channel
- v4
- DataPoint field
DataPoint.menstrualPeriod→MenstrualPeriodIts description: “Optional. Data for points in themenstrual-periodinterval data type collection.”- Compatible devices
- 0 in Google’s table
Operations and request paths
The operations Google’s table lists for menstrual-period, each matched to its users.dataTypes.dataPoints method in the discovery document. The path is the documented path template (the method’s flatPath on https://health.googleapis.com/) with {dataTypesId} filled in as menstrual-period. Google on {user}: “The {user} can be either the alias me or the authenticated user's numeric Health User ID (retrieved via GetIdentity).”
| Table lists | Method | Documented path template |
|---|---|---|
create | create | POST https://health.googleapis.com/v4/users/{usersId}/dataTypes/menstrual-period/dataPoints |
update | patchvia Google’s endpoint-mapping table (flagged below) | PATCH https://health.googleapis.com/v4/users/{usersId}/dataTypes/menstrual-period/dataPoints/{dataPointsId} |
batchDelete | batchDelete | POST https://health.googleapis.com/v4/users/{usersId}/dataTypes/menstrual-period/dataPoints:batchDelete |
Every method, and how many of the data types list it: the methods overview.
Scopes
The scopes Google’s table lists for menstrual-period, as full URLs, with the consent text Google’s Scopes page gives each. Every Google Health API scope.
| Scope | Access | Google’s permission text |
|---|---|---|
https://www.googleapis.com/auth/googlehealth.reproductive_health.writeonly | write | Add reproductive health data to Google Health, and edit or delete the data it adds. |
Fields of Menstrual Period
The schema the discovery document gives DataPoint.menstrualPeriod, required fields first. Types are as the discovery document states them; the label is the word Google’s description opens with. The schemas its fields refer to follow, one level deep.
MenstrualPeriod — Google: “Menstrual period record.”
| Field | Type | Google’s description |
|---|---|---|
intervalRequired | ObservationTimeInterval | Required. Observed interval. |
notesOptional | string | Optional. Standard free-form notes captured at manual logging. |
ObservationTimeInterval
Google: “Represents a time interval of an observed data point.”
| Field | Type | Google’s description |
|---|---|---|
endTimeRequired | string/google-datetime | Required. Observed interval end time. |
endUtcOffsetRequired | string/google-duration | Required. The offset of the user's local time at the end of the observation relative to the Coordinated Universal Time (UTC). |
startTimeRequired | string/google-datetime | Required. Observed interval start time. |
startUtcOffsetRequired | string/google-duration | Required. The offset of the user's local time at the start of the observation relative to the Coordinated Universal Time (UTC). |
civilEndTimeOutput only | CivilDateTime | Output only. Observed interval end time in civil time in the timezone the subject is in at the end of the observed interval |
civilStartTimeOutput only | CivilDateTime | Output only. Observed interval start time in civil time in the timezone the subject is in at the start of the observed interval |
Fitbit Web API predecessor
Google’s Fitbit Web API → Google Health API data-type table has no row for menstrual-period, so it names no Fitbit Web API predecessor.
Google’s full Fitbit Web API mapping tables · the migration playbook
Where Google’s pages disagree
Published as found, with the texts that disagree; nothing here is corrected by us.
Operation name differs
The table lists "update" for menstrual-period, but the discovery document has no method named update; Google's endpoint-mapping table points updates at patch.
- Google's Fitbit migration API specifications: “CREATE & UPDATE Logs”
- Google's Fitbit migration API specifications: “
patchmethod” - the v4 discovery document: “Updates a single identifiable data point. If a data point with the specified
nameis not found, the request will fail.”
Google’s documentation
Related on this site
- Menstrual Cycle API: How to Get Cycle Tracking Data — the metric on every platform this site covers, each type quoted in its platform's own words
- Verification and rate limits
- The Fitbit Web API turn-off
Questions
Which OAuth scopes does the Google Health API menstrual-period data type need?
Google's data-types table (read 2026-10-17) lists https://www.googleapis.com/auth/googlehealth.reproductive_health.writeonly for menstrual-period. The Scopes page's consent text: .reproductive_health.writeonly, "Add reproductive health data to Google Health, and edit or delete the data it adds."
Can apps write menstrual period data to the Google Health API?
Yes. Google's data-types table lists create, update and batchDelete for menstrual-period. create is POST https://health.googleapis.com/v4/users/{usersId}/dataTypes/menstrual-period/dataPoints. The table's "update" has no method of that name in the discovery document; Google's endpoint-mapping table points updates at patch, which is PATCH https://health.googleapis.com/v4/users/{usersId}/dataTypes/menstrual-period/dataPoints/{dataPointsId}. batchDelete is POST https://health.googleapis.com/v4/users/{usersId}/dataTypes/menstrual-period/dataPoints:batchDelete. Writes need https://www.googleapis.com/auth/googlehealth.reproductive_health.writeonly.
How do you aggregate menstrual-period data with the Google Health API?
Not with rollUp or dailyRollUp, going by Google's data-types table: it lists only create, update and batchDelete for menstrual-period. Read the data points with list (or reconcile, where listed) and compute any summary yourself.
Does the Google Health API send webhooks for menstrual-period?
Not according to Google's data-types table, which does not mark menstrual-period with webhook support, and the webhooks guide does not list it.
Other reproductive health data types
Sources checked
- Google Health API data types — last updated 2026-10-06 · read 2026-10-17
- Google Health API discovery document (v4) — revision 20261014 · read 2026-10-17
- Scopes — last updated 2026-10-09 · read 2026-10-17
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