In order to objectively grasp a stress state of a user and to prevent postpartum depression, biological gas information is acquired via a network, where the biological gas information indicates a concentration of acetophenone of the user and is obtained by a sensor that detects acetophenone released from a skin surface of the user. From a memory storing information including an upper limit of a normal range of the concentration of acetophenone per unit period, the information indicating the upper limit of the normal range is read out. When a frequency in the unit period with which the concentration of acetophenone of the user exceeds the upper limit of the normal range is determined to have an increasing tendency based on the biological gas information obtained during a pregnancy period of the user, the information related to stress of the user is output to an information terminal of the user.

In order to objectively grasp a stress state of a user and to prevent postpartum depression, biological gas information is acquired via a network, where the biological gas information indicates a concentration of heptadecane of the user and is obtained by a sensor that detects heptadecane released from a skin surface of the user. From a memory storing information including an upper limit of a normal range of the concentration of heptadecane per unit period, the information indicating the upper limit of the normal range is read out. When a frequency in the unit period with which the concentration of heptadecane of the user exceeds the upper limit of the normal range is determined to have an increasing tendency based on the biological gas information obtained during a pregnancy period of the user, the information related to stress of the user is output to an information terminal of the user.

In order to objectively grasp a stress state of a user and to prevent postpartum depression, biological gas information is acquired via a network, where the biological gas information indicates a concentration of dimethyl adipate of the user and is obtained by a sensor that detects dimethyl adipate released from a skin surface of the user. From a memory storing information including an upper limit of a normal range of the concentration of dimethyl adipate per unit period, the information indicating the upper limit of the normal range is read out. When a frequency in the unit period with which the concentration of dimethyl adipate of the user exceeds the upper limit of the normal range is determined to have an increasing tendency based on the biological gas information obtained during a pregnancy period of the user, the information related to stress of the user is output to an information terminal of the user.

To objectively grasp a stress state of a user and to prevent a mental disorder of the user, the following steps are performed: acquiring, via a network, biogas information at multiple timings and time information corresponding to each of the multiple timings, wherein the biogas information represents a concentration of 1-dodecanol of a user acquired by a sensor that detects 1-dodecanol discharged from a skin surface of the user; obtaining reference information representing an upper limit of a normal range of the concentration of 1-dodecanol per unit period of time, using a memory storing the reference information representing the upper limit of the normal range; determining a stress time period during which a concentration of the 1-dodecanol of the user is more than the upper limit of the normal range, based on the acquired biological gas information; and outputting time period information indicating the determined stress time period to an information terminal of the user, to display the stress time period indicated by the time period information on a display of the information terminal.

A method comprising: acquiring via a network biogas information representing a concentration of 2-ethylhexanoic acid of the user acquired by a sensor that detects the 2-ethylhexanoic acid discharged from a skin surface of the user; obtaining the reference information representing a lower limit of a normal range of the concentration of 2-ethylhexanoic acid per unit period of time, using a memory storing the reference information; and outputting information related to stress of the user an information terminal of the user, after it is determined that a frequency that concentration of the 2-ethylhexanoic acid of the user per the unit period of time is less than the lower limit of the normal range tends to increase, based on the biogas information acquired in a pregnancy period of the user.

In order to objectively grasp a stress state of a user and to prevent postpartum depression, biological gas information is acquired via a network, where the biological gas information indicates a concentration of ethylene glycol of the user and is obtained by a sensor that detects ethylene glycol released from a skin surface of the user. From a memory storing information including an upper limit of a normal range of the concentration of ethylene glycol per unit period, the information indicating the upper limit of the normal range is read out. When a frequency in the unit period with which the concentration of ethylene glycol of the user exceeds the upper limit of the normal range is determined to have an increasing tendency based on the biological gas information obtained during a pregnancy period of the user, the information related to stress of the user is output to an information terminal of the user.

In order to objectively grasp a stress state of a user and to prevent postpartum depression, biological gas information is acquired via a network, where the biological gas information indicates a concentration of phenol of the user and is obtained by a sensor that detects phenol released from a skin surface of the user. From a memory storing information including an upper limit of a normal range of the concentration of phenol per unit period, the information indicating the upper limit of the normal range is read out. When a frequency in the unit period with which the concentration of phenol of the user exceeds the upper limit of the normal range is determined to have an increasing tendency based on the biological gas information obtained during a pregnancy period of the user, the information related to stress of the user is output to an information terminal of the user.

In order to objectively grasp a stress state of a user and to prevent postpartum depression, biological gas information is acquired via a network, where the biological gas information indicates a concentration of benzyl alcohol of the user and is obtained by a sensor that detects benzyl alcohol released from a skin surface of the user. From a memory storing information including an upper limit of a normal range of the concentration of benzyl alcohol per unit period, the information indicating the upper limit of the normal range is read out. When a frequency in the unit period with which the concentration of benzyl alcohol of the user exceeds the upper limit of the normal range is determined to have an increasing tendency based on the biological gas information obtained during a pregnancy period of the user, the information related to stress of the user is output to an information terminal of the user.

The present solution discusses a system configured to evaluate the progress of labor induction by monitoring the uterine response to induction drugs or mechanical induction methods and assess the physiological status of the uterus. The uterine response to drugs can vary over the course of labor, but by categorizing the uterine response in real time the system can control an infusion system to deliver patient specific amounts of drugs to the patient that improves patient outcome while providing cost savings.

Provided is a method for identifying pregnancy failure in a subject, the method comprising determining a concentration of at least one element of fetal or embryonic origin in the vaginal fluid of the subject; and comparing the concentration of the at least one element of fetal or embryonic origin to a reference value, wherein when the concentration of the at least one element of fetal or embryonic origin in the vaginal fluid is higher than the reference value, pregnancy failure is indicated.