Ineffective communication patterns (insufficient talk about significant things) 

Sexual incompatibilities (as differences in sex drive, inhibited sexual drive)

Anxiety over making and/or maintaining a long-term commitment 

Financial difficulties 

Job stress 

Fewer shared activities 

Reduced exchange of affection 

Infidelity 

Lack of sensitivity or indifference to a partner's feelings or wishes 

Conflicts over power and control 

Conflicts over money, independence, in-laws or children 

Physical and/or emotional abuse 

An inability to respond positively to changing role demands, such as the return to work by one partner or birth of a child 

Unexplored differences in expectations