added code

code/utils/cycle_utils.py

@@ -0,0 +1,21 @@
+def get_ovulation_day(cycle: dict) -> int:
+    """
+    Get the ovulation day of a cycle.
+    :param cycle: cycle dict
+    :return: ovulation day
+    """
+    try:
+        is_biphasic = "classification_results" in cycle and cycle["classification_results"][0]["results"][
+            "predicted_class"] == "biphasic"
+        if not is_biphasic:
+            return None
+
+        has_ov_detection = "ov_detection_results" in cycle
+        if not has_ov_detection:
+            return None
+
+        ov_detection_results = cycle["ov_detection_results"][0]["results"]["ovulation_day"]
+        return ov_detection_results
+    except Exception as e:
+        # print(e)
+        return None