Timing
Criterion A: During most menstrual cycles throughout the past year, at least 5 of the symptoms outlined in Criterion B and Criterion C must be present in the final week before the onset of menses, must start to improve within a few days after the onset of menses, and become minimal or absent in the week post-menses. Symptoms
Criterion B: One (or more) of the following symptoms must be present:

Marked affective lability (e.g., mood swings, feeling suddenly sad or tearful, or increased sensitivity to rejection)
Marked irritability or anger or increased interpersonal conflicts
Marked depressed mood, feelings of hopelessness, or self-deprecating thoughts
Marked anxiety, tension, and/or feelings of being keyed up or on edgeCriterion C: One (or more) of the following symptoms must be present additionally, to reach a total of 5 symptoms when combined with present symptoms from Criterion B above:
Decreased interest in usual activities (e.g., work, school, friends, hobbies). Subjective difficulty in concentration. Lethargy, easy fatigability, or marked lack of energy. Marked change in appetite; overeating; or specific food cravings. Hypersomnia or insomnia. A sense of being overwhelmed or out of control. Physical symptoms such as breast tenderness or swelling, joint or muscle pain, a sensation of "bloating," or weight gain.Severity
Criterion D: The symptoms observed in Criteria A-C are associated with clinically significant distress or interference with work, school, usual social activities, or relationships with others (e.g., avoidance of social activities; decreased productivity and efficiency at work, school, or home).
Investigation
In a hospital, physicians respond to a case of hypovolemic shock by conducting these investigations:
Blood tests: U+Es/Chem7, full blood count, glucose, blood type and screen
Central venous catheter
Arterial line
Urine output measurements (via urinary catheter)
Blood pressure
SpO2 oxygen saturation monitoring

Stages
Untreated hypovolemia can lead to shock (see also: hypovolemic shock). Most sources state that there are 4 stages of hypovolemia and subsequent shock; however, a number of other systems exist with as many as 6 stages.The 4 stages are sometimes known as the "Tennis" staging of hypovolemic shock, as the stages of blood loss (under 15% of volume, 15–30% of volume, 30–40% of volume and above 40% of volume) mimic the scores in a game of tennis: 15, 15–30, 30–40 and 40. It is basically the same as used in classifying bleeding by blood loss. The signs and symptoms of the major stages of hypovolemic shock include:

Treatment
Field care
The most important step in treatment of hypovolemic shock is to identify and control the source of bleeding.Medical personnel should immediately supply emergency oxygen to increase efficiency of the patients remaining blood supply. This intervention can be life-saving.Also, the respiratory pump is especially important during hypovolemia as spontaneous breathing may help reduce the effect of this loss of blood pressure on stroke volume by increasing venous return.The use of intravenous fluids (IVs) may help compensate for lost fluid volume, but IV fluids cannot carry oxygen the way blood does—however, researchers are developing blood substitutes that can.